Chứng minh 6^(2n)+19^n-2^(n+1) chia hết cho 17

$6^{2n}+19^n-2^{n+1}$

$=36^n+19^n-4^n$

$=36^n+19^n-2^n-2^n$

$=\left(36^n-2^n\right)+\left(19^n-2^n\right)$

$=34^n+17^n⋮17$