Question

aflati ultima cifra a nr. a = 72 la puterea 2003 + 63 la puterea 2003 + 54 la puterea 2003 +37 la puterea 2003 =

Answer 1

u(72^2003+63^2003+54^2003+37^2003)=
=u[u(72^2003)+u(63^2003)+u(54^2003)+
+u(37^2003)]=u[u(2^3)+u(3^3)+u(4^3)+u(7^3)]=
=u(8+9+12+343)=u(372)=2