Class 12

Math

Algebra

Binomial Theorem

Consider a $G.P.$ with first term $(1+x)_{n}$, $∣x∣<1$, common ratio $21+x $ and number of terms $(n+1)$. Let $_{′}S_{′}$ be sum of all the terms of the $G.P.$, then The coefficient of $x_{n}$ is $_{′}S_{′}$ is

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