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Let (1 + x^2)^2 (1 + x)^n = A0 +A1 x+A2 ...

Let `(1 + x^2)^2 (1 + x)^n = A_0 +A_1 x+A_2 x^2 + ...... ` If `A_0, A_1, A_2,` are in `A.P.` then the value of `n` is

A

n=2 or 3

B

n=2 only

C

n=3 only

D

n=4

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The correct Answer is:
A
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