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Questions  >>  CBSE XI  >>  Math  >>  Binomial Theorem
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If the coefficients of $x^2$ and $x^3$ in the expansion of $(3+kx)^9$ are equal then the value of $k$ is

$\begin{array}{1 1}(A)\;-\large\frac{9}{7}\\(B)\;\large\frac{9}{7}\\(C)\;\large\frac{7}{9}\\(D)\;\text{None of these}\end{array} $

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