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$If the coefficients of x^{2} and x^{3} in expansion of (3 + k x)^{9} are equal, then the value of k$

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detailed solution

Correct option is B

9C2(3)7k2=9C3(3)8(k)3⇒k=97

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If the coefficients of x2 and x3 in expansion of (3+kx)9 are equal, then the value of k

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$If the coefficients of x^{2} and x^{3} in expansion of (3 + k x)^{9} are equal, then the value of k$