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aflati ultima cifra a numarului a= 2 la puterea 2017 + 3 la puterea 2017 + 5 la puterea 2016. VA ROG ! E URGENT !


Răspuns :

U(2^2017)=U(2^1)=2
U (3^2017)=U(3^1)=3
U(5^2016)=5
 deci ultima cifra a numarului cerut va fi  U (2+3+5)=U(10)=0
as simple as that!!!
a=2^2017+3^2017+5^2016
U(2^2017)=U(2^1)=2
U (3^2017)=U(3^1)=3
U(5^2016)=5
U (2+3+5)=U(10)=0