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Let (1+x^2)^2(1+x)^n=A0+A1x+A2x^2+..... ...

Let `(1+x^2)^2(1+x)^n=A_0+A_1x+A_2x^2+.....` If `A_0,A_1,A_2` are in A.P. then the value of n is-

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