Question

CMR:a)2⁹+2⁹⁹ chia hết cho 100

b)2⁷⁰+3⁷⁰ chia hết cho 13

Answer 1

b: \(2^{70}+3^{70}=4^{35}+9^{35}=\left(4+9\right)\cdot A⋮13\)