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	<id>https://wiki.universitas.ro/index.php?action=history&amp;feed=atom&amp;title=Gazeta_matematic%C4%83_1977</id>
	<title>Gazeta matematică 1977 - Revision history</title>
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	<updated>2026-06-16T21:54:53Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10391&amp;oldid=prev</id>
		<title>Andrei.Horvat: /* Gazeta Matematică 1/1977 */</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10391&amp;oldid=prev"/>
		<updated>2024-12-10T04:42:33Z</updated>

		<summary type="html">&lt;p&gt;&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Gazeta Matematică 1/1977&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 04:42, 10 December 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l4&quot;&gt;Line 4:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 4:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;Fie &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt; mulțimea numerelor de forma &amp;lt;math&amp;gt;\overline{7a8b}&amp;lt;/math&amp;gt;, care se divid cu &amp;lt;math&amp;gt;15&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;B&amp;lt;/math&amp;gt; mulțimea numerelor de forma &amp;lt;math&amp;gt;\overline{7x8y}&amp;lt;/math&amp;gt;, care se divid cu &amp;lt;math&amp;gt;40&amp;lt;/math&amp;gt;. Să se determine mulțimile &amp;lt;math&amp;gt;A \cup B&amp;lt;/math&amp;gt;, &amp;lt;math&amp;gt;A\cap B&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;A\setminus B&amp;lt;/math&amp;gt;.&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;Fie &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt; mulțimea numerelor de forma &amp;lt;math&amp;gt;\overline{7a8b}&amp;lt;/math&amp;gt;, care se divid cu &amp;lt;math&amp;gt;15&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;B&amp;lt;/math&amp;gt; mulțimea numerelor de forma &amp;lt;math&amp;gt;\overline{7x8y}&amp;lt;/math&amp;gt;, care se divid cu &amp;lt;math&amp;gt;40&amp;lt;/math&amp;gt;. Să se determine mulțimile &amp;lt;math&amp;gt;A \cup B&amp;lt;/math&amp;gt;, &amp;lt;math&amp;gt;A\cap B&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;A\setminus B&amp;lt;/math&amp;gt;.&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;[[E:5756]] (Dumitru Acu)&#039;&#039;&#039;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;Fie &amp;lt;math&amp;gt;ABCD&amp;lt;/math&amp;gt; un romb. Prin vârful &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt; ducem o dreaptă arbitrară care intersectează pe &amp;lt;math&amp;gt;BC&amp;lt;/math&amp;gt; în &amp;lt;math&amp;gt;E&amp;lt;/math&amp;gt;, pe &amp;lt;math&amp;gt;DC&amp;lt;/math&amp;gt; în &amp;lt;math&amp;gt;F&amp;lt;/math&amp;gt;, iar pe diagonala &amp;lt;math&amp;gt;BD&amp;lt;/math&amp;gt; în &amp;lt;math&amp;gt;G&amp;lt;/math&amp;gt;. Să se arate că dreapta &amp;lt;math&amp;gt;CG&amp;lt;/math&amp;gt; este tangentă în &amp;lt;math&amp;gt;C&amp;lt;/math&amp;gt; cercului circumscris triunghiului &amp;lt;math&amp;gt;ECF&amp;lt;/math&amp;gt;.&#039;&#039;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&amp;#039;&amp;#039;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;pentru&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;a cărei valoare satisface proporția&amp;#039;&amp;#039; &amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;iar&amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;fiind a treia parte din&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt;. &amp;#039;&amp;#039; Latura neparalelă este de&amp;#039;&amp;#039; &amp;lt;math&amp;gt;\sqrt{3}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; ori mai mare decât media geometrică a lui&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; și &amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;. Să determine aria lotului știind că baza mare a trapezului este de 4m.&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&amp;#039;&amp;#039;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;pentru&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;a cărei valoare satisface proporția&amp;#039;&amp;#039; &amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;iar&amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;fiind a treia parte din&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt;. &amp;#039;&amp;#039; Latura neparalelă este de&amp;#039;&amp;#039; &amp;lt;math&amp;gt;\sqrt{3}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; ori mai mare decât media geometrică a lui&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; și &amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;. Să determine aria lotului știind că baza mare a trapezului este de 4m.&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10384&amp;oldid=prev</id>
		<title>Andrei.Horvat: /* Gazeta Matematică 1/1977 */</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10384&amp;oldid=prev"/>
		<updated>2024-12-08T04:32:11Z</updated>

		<summary type="html">&lt;p&gt;&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Gazeta Matematică 1/1977&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 04:32, 8 December 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l3&quot;&gt;Line 3:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 3:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5743]] (Grigore Balog)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5743]] (Grigore Balog)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;Fie &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt; mulțimea numerelor de forma &amp;lt;math&amp;gt;\overline{7a8b}&amp;lt;/math&amp;gt;, care se divid cu &amp;lt;math&amp;gt;15&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;B&amp;lt;/math&amp;gt; mulțimea numerelor de forma &amp;lt;math&amp;gt;\overline{7x8y}&amp;lt;/math&amp;gt;, care se divid cu &amp;lt;math&amp;gt;40&amp;lt;/math&amp;gt;. Să se determine mulțimile &amp;lt;math&amp;gt;A \cup B&amp;lt;/math&amp;gt;, &amp;lt;math&amp;gt;A\cap B&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;A\&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;setmnus &lt;/del&gt;B&amp;lt;/math&amp;gt;.&#039;&#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;Fie &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt; mulțimea numerelor de forma &amp;lt;math&amp;gt;\overline{7a8b}&amp;lt;/math&amp;gt;, care se divid cu &amp;lt;math&amp;gt;15&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;B&amp;lt;/math&amp;gt; mulțimea numerelor de forma &amp;lt;math&amp;gt;\overline{7x8y}&amp;lt;/math&amp;gt;, care se divid cu &amp;lt;math&amp;gt;40&amp;lt;/math&amp;gt;. Să se determine mulțimile &amp;lt;math&amp;gt;A \cup B&amp;lt;/math&amp;gt;, &amp;lt;math&amp;gt;A\cap B&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;A\&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;setminus &lt;/ins&gt;B&amp;lt;/math&amp;gt;.&#039;&#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&amp;#039;&amp;#039;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;pentru&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;a cărei valoare satisface proporția&amp;#039;&amp;#039; &amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;iar&amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;fiind a treia parte din&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt;. &amp;#039;&amp;#039; Latura neparalelă este de&amp;#039;&amp;#039; &amp;lt;math&amp;gt;\sqrt{3}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; ori mai mare decât media geometrică a lui&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; și &amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;. Să determine aria lotului știind că baza mare a trapezului este de 4m.&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&amp;#039;&amp;#039;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;pentru&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;a cărei valoare satisface proporția&amp;#039;&amp;#039; &amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;iar&amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;fiind a treia parte din&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt;. &amp;#039;&amp;#039; Latura neparalelă este de&amp;#039;&amp;#039; &amp;lt;math&amp;gt;\sqrt{3}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; ori mai mare decât media geometrică a lui&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; și &amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;. Să determine aria lotului știind că baza mare a trapezului este de 4m.&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10381&amp;oldid=prev</id>
		<title>Andrei.Horvat: /* Gazeta Matematică 1/1977 */</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10381&amp;oldid=prev"/>
		<updated>2024-12-08T04:31:09Z</updated>

		<summary type="html">&lt;p&gt;&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Gazeta Matematică 1/1977&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 04:31, 8 December 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Gazeta Matematică 1/1977 ==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Gazeta Matematică 1/1977 ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;[[E:5743]] (Grigore Balog)&#039;&#039;&#039;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;Fie &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt; mulțimea numerelor de forma &amp;lt;math&amp;gt;\overline{7a8b}&amp;lt;/math&amp;gt;, care se divid cu &amp;lt;math&amp;gt;15&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;B&amp;lt;/math&amp;gt; mulțimea numerelor de forma &amp;lt;math&amp;gt;\overline{7x8y}&amp;lt;/math&amp;gt;, care se divid cu &amp;lt;math&amp;gt;40&amp;lt;/math&amp;gt;. Să se determine mulțimile &amp;lt;math&amp;gt;A \cup B&amp;lt;/math&amp;gt;, &amp;lt;math&amp;gt;A\cap B&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;A\setmnus B&amp;lt;/math&amp;gt;.&#039;&#039;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&amp;#039;&amp;#039;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;pentru&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;a cărei valoare satisface proporția&amp;#039;&amp;#039; &amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;iar&amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;fiind a treia parte din&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt;. &amp;#039;&amp;#039; Latura neparalelă este de&amp;#039;&amp;#039; &amp;lt;math&amp;gt;\sqrt{3}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; ori mai mare decât media geometrică a lui&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; și &amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;. Să determine aria lotului știind că baza mare a trapezului este de 4m.&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&amp;#039;&amp;#039;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;pentru&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;a cărei valoare satisface proporția&amp;#039;&amp;#039; &amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;iar&amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;fiind a treia parte din&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt;. &amp;#039;&amp;#039; Latura neparalelă este de&amp;#039;&amp;#039; &amp;lt;math&amp;gt;\sqrt{3}&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; ori mai mare decât media geometrică a lui&amp;#039;&amp;#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &amp;#039;&amp;#039; și &amp;#039;&amp;#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;. Să determine aria lotului știind că baza mare a trapezului este de 4m.&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10376&amp;oldid=prev</id>
		<title>Andrei.Horvat at 04:03, 8 December 2024</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10376&amp;oldid=prev"/>
		<updated>2024-12-08T04:03:45Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 04:03, 8 December 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l3&quot;&gt;Line 3:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 3:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&#039;&#039;&amp;lt;math display=&quot;block&quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&#039;&#039;pentru&#039;&#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &#039;&#039;a cărei valoare satisface proporția&#039;&#039; &amp;lt;math display=&quot;block&quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt; &#039;&#039;iar&#039;&#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt; &#039;&#039;fiind a treia parte din&#039;&#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt;. &#039;&#039; Latura neparalelă este de&#039;&#039; &amp;lt;math&amp;gt;\sqrt{3}&amp;lt;/math&amp;gt; &#039;&#039; ori mai mare decât media geometrică a lui&#039;&#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &#039;&#039; și &#039;&#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt;&#039;&#039;. Să determine aria lotului știind că baza &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;mere &lt;/del&gt;a trapezului este de 4m.&#039;&#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&#039;&#039;&amp;lt;math display=&quot;block&quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&#039;&#039;pentru&#039;&#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &#039;&#039;a cărei valoare satisface proporția&#039;&#039; &amp;lt;math display=&quot;block&quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt; &#039;&#039;iar&#039;&#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt; &#039;&#039;fiind a treia parte din&#039;&#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt;. &#039;&#039; Latura neparalelă este de&#039;&#039; &amp;lt;math&amp;gt;\sqrt{3}&amp;lt;/math&amp;gt; &#039;&#039; ori mai mare decât media geometrică a lui&#039;&#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &#039;&#039; și &#039;&#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt;&#039;&#039;. Să determine aria lotului știind că baza &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;mare &lt;/ins&gt;a trapezului este de 4m.&#039;&#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10375&amp;oldid=prev</id>
		<title>Andrei.Horvat at 04:03, 8 December 2024</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10375&amp;oldid=prev"/>
		<updated>2024-12-08T04:03:23Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
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				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 04:03, 8 December 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l3&quot;&gt;Line 3:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 3:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&#039;&#039;&amp;lt;math display=&quot;block&quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&#039;&#039;pentru&#039;&#039; &amp;lt;math display=&quot;block&quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&#039;&#039;&amp;lt;math display=&quot;block&quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&#039;&#039;pentru&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &#039;&#039;a cărei valoare satisface proporția&lt;/ins&gt;&#039;&#039; &amp;lt;math display=&quot;block&quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;iar&#039;&#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt; &#039;&#039;fiind a treia parte din&#039;&#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt;. &#039;&#039; Latura neparalelă este de&#039;&#039; &amp;lt;math&amp;gt;\sqrt{3}&amp;lt;/math&amp;gt; &#039;&#039; ori mai mare decât media geometrică a lui&#039;&#039; &amp;lt;math&amp;gt;x&amp;lt;/math&amp;gt; &#039;&#039; și &#039;&#039; &amp;lt;math&amp;gt;y&amp;lt;/math&amp;gt;&#039;&#039;. Să determine aria lotului știind că baza mere a trapezului este de 4m.&#039;&#039;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10374&amp;oldid=prev</id>
		<title>Andrei.Horvat at 03:59, 8 December 2024</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10374&amp;oldid=prev"/>
		<updated>2024-12-08T03:59:02Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 03:59, 8 December 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l3&quot;&gt;Line 3:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 3:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&#039;&#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&#039;&#039;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;math display=&quot;block&quot;&amp;gt;E\left(x,y\right) = \frac{\left(x+y\right)^2 - x-y}{x^2-y^2}:\left[ 1 - \frac{1}{x+y}\right]&amp;lt;/math&amp;gt;&#039;&#039;pentru&#039;&#039; &amp;lt;math display=&quot;block&quot;&amp;gt;\frac{x-2,5}{1\frac{1}{2}} = \frac{x}{2}&amp;lt;/math&amp;gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10373&amp;oldid=prev</id>
		<title>Andrei.Horvat: Created page with &quot;== Gazeta Matematică 1/1977 ==  &#039;&#039;&#039;E:5763 (Tudor Rițiu)&#039;&#039;&#039;  &#039;&#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&#039;&#039;&quot;</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=Gazeta_matematic%C4%83_1977&amp;diff=10373&amp;oldid=prev"/>
		<updated>2024-12-08T03:55:49Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;== Gazeta Matematică 1/1977 ==  &amp;#039;&amp;#039;&amp;#039;&lt;a href=&quot;/wiki/E:5763&quot; title=&quot;E:5763&quot;&gt;E:5763&lt;/a&gt; (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;  &amp;#039;&amp;#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&amp;#039;&amp;#039;&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;== Gazeta Matematică 1/1977 ==&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;[[E:5763]] (Tudor Rițiu)&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;Un lot în formă de trapez isoscel are, în metri, baza mică egală cu valoarea numerică a expresiei&amp;#039;&amp;#039;&lt;/div&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
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