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

Let `(1+x^2)^2(1+x)^n=A_0+A_1x+A_2x^2+…."if" A_0A_1A_2` are in A.P then the value of n is

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