The number of dissimilar terms in the expansion of is

MATHEMATICS · Single correct · CBSE · Mathematics · Binomial Theorem · Binomial Theorem

Problem

The number of dissimilar terms in the expansion of (x+1x+x2+1x2)15\left(x+\frac{1}{x}+x^2+\frac{1}{x^2}\right)^{15} is (1) 61 (2) 121 (3) 255 (4) 16

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