7101=74.74...74.7
=(..1)(...1)...(...1).7=...7 chia 10 dư 7
7101=74.25+1=74.5.7=...01.7=...07
=>7101 chia 10 dư 7
\(7^{101}=\left(7^4\right)^{25}.7=\left(...1\right)^{25}.7=\left(...1\right).7=....7\)
Chia 10 dư 7
7^101=(7^4&^25.7=(...1)^25.7=(...1).7=...7
tick nhé