Răspuns :
Răspuns:
b) U(b)=U(7+7^2+7^3+...+7^43)=U(7+12*21)=
=U(252+7)=U(259)=9.
c) U(c)=U(3^0+3^1+3^2+3^3+.....+3^42)=
=U(20*4+13)=U(93)=3.
d) U(d)=U(8+8^2+8^3+.....+8^88)
=U(20*22)=U(440)=0.
Răspuns:
b) U(b)=U(7+7^2+7^3+...+7^43)=U(7+12*21)=
=U(252+7)=U(259)=9.
c) U(c)=U(3^0+3^1+3^2+3^3+.....+3^42)=
=U(20*4+13)=U(93)=3.
d) U(d)=U(8+8^2+8^3+.....+8^88)
=U(20*22)=U(440)=0.