Question

For all positive integral values of $n,3^{2n}-2n+1$ is divisible by

• A. $2$
• B. $4$
• C. $8$
• D. $12$

Answer 1

Answer: (A)

Putting $n=2$ in $3^{2n}-2n+1$ then,
$3^{2\times 2}-2\times 2+1=81-4+1=78$, which is divisible by $2.$