Question

so du cua E=7+7mu2+7mu3+......+7mu36 khi chia cho8

 

Answer 1

mu la so mu

 

Answer 2

\(E=\left(7+7^2\right)+\left(7^3+7^4\right)+....+\left(7^{35}+7^{36}\right)\)

= 7.8 + 7^3.8 + .... + 7^35 . 8

= 8.(7+7^3+...+7^35) 

Chia 8 dư 0 

Answer 3

dư o đó bạn Trang