For all positive integral values of n, 3 2 n - 2n + 1 is divisible by Options: A . &nbsp 2 B . &nbsp 4 C . &nbsp 8 D . &nbsp 12

Answer: Option A : A Putting n = 2 in 3 2 n - 2n + 1 then, 3 2 × 2 - 2×2+1 = 81 - 4 + 1 = 78, which is divisible by 2.

For all positive integral values of n, 32n

Question -

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

divisible by

Options:

A . 2

B . 4

C . 8

D . 12

Answer: Option A
:
A

Putting n = 2 in $3^{2 n}$ - 2n + 1 then,

$3^{2 \times 2}$ - 2×2+1 = 81 - 4 + 1 = 78, which is divisible

by 2.

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