Question

For every natural number n, 3^{2n +2} –8n – 9 is divisible by

• A. 16
• B. 128
• C. 256
• D. None of these

Answer 1

Answer: (A)

16

Answer 2

P(1) = 3⁴ – 8 – 9 = 64 which is not divisible by 128 and 256

but divisible by 16.