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a fost răspuns

ultima cifra a numarului 9 la puterea 72​

Răspuns :

[tex]\displaystyle\bf\\U\Big(9^{72}\Big)=U\Big(9^{2\times36}\Big)=U\left(\Big(9^{2}\Big)^{36}\right)=U\Big(81^{36}\Big)=U\Big(1^{36}\Big)=\boxed{\bf1}[/tex]