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• 18:51, 14 July 2025 Andrei.Horvat talk contribs created page S:E18.122 (Created page with "'''S:E18.122 (Florin Bojor)''' ''Verificați dacă numărul <math>a={1^{{{3}^{{{5}^{{{\cdots}^{2019}}}}}}}}+{3^{{{5}^{{{7}^{{{\cdots}^{2019}}}}}}}}+{5^{{{7}^{{{9}^{{{\cdots}^{2019}}}}}}}}+\ldots +{2017^{2019}}+2019</math> este divizibil cu <math>10</math>. '''Soluție.''' Notăm cu <math>u\left(n\right)</math> ultima cifră a numărului natural <math>n</math>, iar prin <math>\tilde{n}</math> nătăm numărul") Tag: Visual edit: Switched