Răspuns:
e)6
f)6
g)1
Explicație pas cu pas:
e) 56= 4×14 => U(68^56)=U(68^4)=U(8^4)=6
f) 37=4×9+1 => U(89^37)=U(89^1)=U(9^1)=9
38=4×9+2=> U(88^38)=U(88^2)=U(8^2)=4
39=4×9+3=> U(87^39)=U(87^3)=U(7^3)=3
U(89^37+ 88^38+87^39)= U(9+4+3)=U(16)=6
g)U(71^10000001)= U(1^10000001)= 1
