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Questions  >>  CBSE XI  >>  Math  >>  Binomial Theorem
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Q)

If the coefficient of $2^{nd},3^{rd}$ and $4^{th}$ terms in the expansion of $(1+x)^n$ are in $A.P$ then the value of $n$ is

$\begin{array}{1 1}(A)\;2\\(B)\;7\\(C)\;11\\(D)\;14\end{array} $

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