Let \( \left(1+x^{2}\right)^{2}(1+x)^{n}=A_{0}+A_{1} x+A_{2} x^{2}+...

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Let \( \left(1+x^{2}\right)^{2}(1+x)^{n}=A_{0}+A_{1} x+A_{2} x^{2}+\ldots \ldots \). If \( A_{0}, A_{1}, A_{2} \) are in A.P. then the value of \( n \) is
(A) 2
(B) 3
(C) 5
(D) 7
\( \mathrm{P} \)
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