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	<id>https://wiki.universitas.ro/index.php?action=history&amp;feed=atom&amp;title=E14309</id>
	<title>E14309 - Revision history</title>
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	<updated>2026-05-01T03:41:32Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10602&amp;oldid=prev</id>
		<title>Bogdan.Pop: Blanked the page</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10602&amp;oldid=prev"/>
		<updated>2025-01-17T12:52:04Z</updated>

		<summary type="html">&lt;p&gt;Blanked the page&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 12:52, 17 January 2025&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; 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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;E:14309. (Alexandru Vele, Târgu Lăpuș)&#039;&#039;&#039;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;Determinați numerele naturale &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt;&#039;&#039; &#039;&#039;astfel încât să avem egalitatea:&#039;&#039;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;2012 = &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt;&#039;&#039;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;Arătați că a&amp;lt;sub&amp;gt;1&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; +  a&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;5&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;6&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;7&amp;lt;/sub&amp;gt; =  m&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; + n&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; , m,n ∈ &amp;lt;math&amp;gt;\Nu&amp;lt;/math&amp;gt;&#039;&#039;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;Soluție.&#039;&#039;&#039; &lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Dacă &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; sunt mai mici decât 3 atunci, &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt; poate fi privită ca scrierea în baza 3 a lui 2012. Cum &amp;lt;math&amp;gt;2012 = 2 \cdot 3^0 + 1 \cdot 3^1 + 1 \cdot 3^2 + 2 \cdot 3^3 + 0 \cdot 3^4 + 2 \cdot 3^5 + 2 \cdot 3^6&amp;lt;/math&amp;gt; avem &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7 = 2 + 1 + 1 + 2 + 0 + 2 + 2 = 10 = 1^2 + 3^2&amp;lt;/math&amp;gt;. Dacă cel puțin unul dintre numerele &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; este mai mare sau egal cu 3, atunci problema nu mai rămâne adevărată; 2012 se poate scrie ca o sumă de puteri ale lui 3, dar suma &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7&amp;lt;/math&amp;gt; nu se mai scrie, sigur, ca sumă două pătrate.&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Bogdan.Pop</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10599&amp;oldid=prev</id>
		<title>Bogdan.Pop at 12:49, 17 January 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10599&amp;oldid=prev"/>
		<updated>2025-01-17T12:49:50Z</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 12:49, 17 January 2025&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; 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;&#039;14309. (Alexandru Vele, Târgu Lăpuș)&#039;&#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;&#039;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;E:&lt;/ins&gt;14309. (Alexandru Vele, Târgu Lăpuș)&#039;&#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;Determinați numerele naturale &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; &amp;#039;&amp;#039;astfel încât să avem egalitatea:&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;Determinați numerele naturale &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; &amp;#039;&amp;#039;astfel încât să avem egalitatea:&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Bogdan.Pop</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10598&amp;oldid=prev</id>
		<title>Bogdan.Pop at 12:49, 17 January 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10598&amp;oldid=prev"/>
		<updated>2025-01-17T12:49:36Z</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;
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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 12:49, 17 January 2025&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; 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;&#039;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;E:&lt;/del&gt;14309. (Alexandru Vele, Târgu Lăpuș)&#039;&#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;&#039;14309. (Alexandru Vele, Târgu Lăpuș)&#039;&#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;Determinați numerele naturale &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; &amp;#039;&amp;#039;astfel încât să avem egalitatea:&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;Determinați numerele naturale &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; &amp;#039;&amp;#039;astfel încât să avem egalitatea:&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Bogdan.Pop</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10595&amp;oldid=prev</id>
		<title>Danciu Daniel at 02:50, 17 January 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10595&amp;oldid=prev"/>
		<updated>2025-01-17T02:50:45Z</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;
				&lt;col class=&quot;diff-content&quot; /&gt;
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				&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 02:50, 17 January 2025&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;&amp;#039;&amp;#039;&amp;#039;E:14309. (Alexandru Vele, Târgu Lăpuș)&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:14309. (Alexandru Vele, Târgu Lăpuș)&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;Determinați numerele naturale&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039; &lt;/del&gt;&amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; &#039;&#039;astfel încât să avem egalitatea:&#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;Determinați numerele naturale &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039; &lt;/ins&gt;&#039;&#039;astfel încât să avem egalitatea:&#039;&#039;&lt;/div&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; &#039;&#039;2012 =&#039;&#039; &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; &lt;/del&gt;&#039;&#039;Arătați că a&amp;lt;sub&amp;gt;1&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; +  a&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;5&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;6&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;7&amp;lt;/sub&amp;gt; =  m&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; + n&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; , m,n ∈ &amp;lt;math&amp;gt;\Nu&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;2012 = &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&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; 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;&#039;Soluție&#039;&#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; &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;&#039;&#039;Arătați că a&amp;lt;sub&amp;gt;1&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; +  a&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;5&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;6&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;7&amp;lt;/sub&amp;gt; =  m&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; + n&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; , m,n ∈ &amp;lt;math&amp;gt;\Nu&amp;lt;/math&amp;gt;&#039;&#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;/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;&#039;&#039;&#039;Soluție&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;.&lt;/ins&gt;&#039;&#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;Dacă &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; sunt mai mici decât 3 atunci, &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt; poate fi privită ca scrierea în baza 3 a lui 2012. Cum &amp;lt;math&amp;gt;2012 = 2 \cdot 3^0 + 1 \cdot 3^1 + 1 \cdot 3^2 + 2 \cdot 3^3 + 0 \cdot 3^4 + 2 \cdot 3^5 + 2 \cdot 3^6&amp;lt;/math&amp;gt; avem &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7 = 2 + 1 + 1 + 2 + 0 + 2 + 2 = 10 = 1^2 + 3^2&amp;lt;/math&amp;gt;. Dacă cel puțin unul dintre numerele &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; este mai mare sau egal cu 3, atunci problema nu mai rămâne adevărată; 2012 se poate scrie ca o sumă de puteri ale lui 3, dar suma &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7&amp;lt;/math&amp;gt; nu se mai scrie, sigur, ca sumă două pătrate.&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;Dacă &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; sunt mai mici decât 3 atunci, &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt; poate fi privită ca scrierea în baza 3 a lui 2012. Cum &amp;lt;math&amp;gt;2012 = 2 \cdot 3^0 + 1 \cdot 3^1 + 1 \cdot 3^2 + 2 \cdot 3^3 + 0 \cdot 3^4 + 2 \cdot 3^5 + 2 \cdot 3^6&amp;lt;/math&amp;gt; avem &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7 = 2 + 1 + 1 + 2 + 0 + 2 + 2 = 10 = 1^2 + 3^2&amp;lt;/math&amp;gt;. Dacă cel puțin unul dintre numerele &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; este mai mare sau egal cu 3, atunci problema nu mai rămâne adevărată; 2012 se poate scrie ca o sumă de puteri ale lui 3, dar suma &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7&amp;lt;/math&amp;gt; nu se mai scrie, sigur, ca sumă două pătrate.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Danciu Daniel</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10594&amp;oldid=prev</id>
		<title>Danciu Daniel at 02:49, 17 January 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10594&amp;oldid=prev"/>
		<updated>2025-01-17T02:49:58Z</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;
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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 02:49, 17 January 2025&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-l2&quot;&gt;Line 2:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 2:&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;Determinați numerele naturale&amp;#039;&amp;#039; &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;astfel încât să avem egalitatea:&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;Determinați numerele naturale&amp;#039;&amp;#039; &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;astfel încât să avem egalitatea:&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; &#039;&#039;2012 =&#039;&#039; &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;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; 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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;2012 =&#039;&#039; &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt;&lt;/del&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; &lt;/ins&gt;&#039;&#039;Arătați că a&amp;lt;sub&amp;gt;1&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; +  a&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;5&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;6&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;7&amp;lt;/sub&amp;gt; =  m&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; + n&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; , m,n ∈ &amp;lt;math&amp;gt;\Nu&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; 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; &lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;Arătați că a&amp;lt;sub&amp;gt;1&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; +  a&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;5&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;6&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;7&amp;lt;/sub&amp;gt; =  m&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; + n&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; , m,n ∈ &amp;lt;math&amp;gt;\Nu&amp;lt;/math&amp;gt;&#039;&#039;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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; &lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&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;Soluție&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;Soluție&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;Dacă &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; sunt mai mici decât 3 atunci, &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt; poate fi privită ca scrierea în baza 3 a lui 2012. Cum &amp;lt;math&amp;gt;2012 = 2 \cdot 3^0 + 1 \cdot 3^1 + 1 \cdot 3^2 + 2 \cdot 3^3 + 0 \cdot 3^4 + 2 \cdot 3^5 + 2 \cdot 3^6&amp;lt;/math&amp;gt; avem &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7 = 2 + 1 + 1 + 2 + 0 + 2 + 2 = 10 = 1^2 + 3^2&amp;lt;/math&amp;gt;. Dacă cel puțin unul dintre numerele &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; este mai mare sau egal cu 3, atunci problema nu mai rămâne adevărată; 2012 se poate scrie ca o sumă de puteri ale lui 3, dar suma &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7&amp;lt;/math&amp;gt; nu se mai scrie, sigur, ca sumă două pătrate.&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;Dacă &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; sunt mai mici decât 3 atunci, &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt; poate fi privită ca scrierea în baza 3 a lui 2012. Cum &amp;lt;math&amp;gt;2012 = 2 \cdot 3^0 + 1 \cdot 3^1 + 1 \cdot 3^2 + 2 \cdot 3^3 + 0 \cdot 3^4 + 2 \cdot 3^5 + 2 \cdot 3^6&amp;lt;/math&amp;gt; avem &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7 = 2 + 1 + 1 + 2 + 0 + 2 + 2 = 10 = 1^2 + 3^2&amp;lt;/math&amp;gt;. Dacă cel puțin unul dintre numerele &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; este mai mare sau egal cu 3, atunci problema nu mai rămâne adevărată; 2012 se poate scrie ca o sumă de puteri ale lui 3, dar suma &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7&amp;lt;/math&amp;gt; nu se mai scrie, sigur, ca sumă două pătrate.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Danciu Daniel</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10593&amp;oldid=prev</id>
		<title>Danciu Daniel: Created page with &quot;&#039;&#039;&#039;E:14309. (Alexandru Vele, Târgu Lăpuș)&#039;&#039;&#039;  &#039;&#039;Determinați numerele naturale&#039;&#039; &lt;math&gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&lt;/math&gt; &#039;&#039;astfel încât să avem egalitatea:&#039;&#039;  &#039;&#039;2012 =&#039;&#039; &lt;math&gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&lt;/math&gt;  &#039;&#039;Arătați că a&lt;sub&gt;1&lt;/sub&gt; + a&lt;sub&gt;2&lt;/sub&gt; +  a&lt;sub&gt;3&lt;/sub&gt; + a&lt;sub&gt;4&lt;/sub&gt; + a&lt;sub&gt;5&lt;/sub&gt; + a&lt;sub&gt;6&lt;/sub&gt; + a&lt;sub&gt;7&lt;/sub&gt; =  m&lt;sup&gt;2&lt;/sup&gt; + n&lt;sup&gt;2&lt;/sup&gt; , m,n...&quot;</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=E14309&amp;diff=10593&amp;oldid=prev"/>
		<updated>2025-01-17T02:48:45Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;&amp;#039;&amp;#039;&amp;#039;E:14309. (Alexandru Vele, Târgu Lăpuș)&amp;#039;&amp;#039;&amp;#039;  &amp;#039;&amp;#039;Determinați numerele naturale&amp;#039;&amp;#039; &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;astfel încât să avem egalitatea:&amp;#039;&amp;#039;  &amp;#039;&amp;#039;2012 =&amp;#039;&amp;#039; &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt;  &amp;#039;&amp;#039;Arătați că a&amp;lt;sub&amp;gt;1&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; +  a&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;5&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;6&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;7&amp;lt;/sub&amp;gt; =  m&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; + n&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; , m,n...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;E:14309. (Alexandru Vele, Târgu Lăpuș)&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;Determinați numerele naturale&amp;#039;&amp;#039; &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; &amp;#039;&amp;#039;astfel încât să avem egalitatea:&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;2012 =&amp;#039;&amp;#039; &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;Arătați că a&amp;lt;sub&amp;gt;1&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; +  a&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;5&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;6&amp;lt;/sub&amp;gt; + a&amp;lt;sub&amp;gt;7&amp;lt;/sub&amp;gt; =  m&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; + n&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; , m,n ∈ &amp;lt;math&amp;gt;\Nu&amp;lt;/math&amp;gt;&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Soluție&amp;#039;&amp;#039;&amp;#039; &lt;br /&gt;
&lt;br /&gt;
Dacă &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; sunt mai mici decât 3 atunci, &amp;lt;math&amp;gt;a_1 \cdot 3^x + a_2 \cdot 3^y + a_3 \cdot 3^z + a_4 \cdot 3^t + a_5 \cdot 3^u + a_6 \cdot 3^r + a_7 \cdot 3^s&amp;lt;/math&amp;gt; poate fi privită ca scrierea în baza 3 a lui 2012. Cum &amp;lt;math&amp;gt;2012 = 2 \cdot 3^0 + 1 \cdot 3^1 + 1 \cdot 3^2 + 2 \cdot 3^3 + 0 \cdot 3^4 + 2 \cdot 3^5 + 2 \cdot 3^6&amp;lt;/math&amp;gt; avem &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7 = 2 + 1 + 1 + 2 + 0 + 2 + 2 = 10 = 1^2 + 3^2&amp;lt;/math&amp;gt;. Dacă cel puțin unul dintre numerele &amp;lt;math&amp;gt;a_1, a_2, a_3, a_4, a_5, a_6, a_7&amp;lt;/math&amp;gt; este mai mare sau egal cu 3, atunci problema nu mai rămâne adevărată; 2012 se poate scrie ca o sumă de puteri ale lui 3, dar suma &amp;lt;math&amp;gt;a_1 +  a_2 + a_3 + a_4 + a_5 + a_6 + a_7&amp;lt;/math&amp;gt; nu se mai scrie, sigur, ca sumă două pătrate.&lt;/div&gt;</summary>
		<author><name>Danciu Daniel</name></author>
	</entry>
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