Find a if the coefficients of x 2 and x 3 in the expansion of (3 – InterviewSolution

1.	Find a if the coefficients of x 2 and x 3 in the expansion of (3 + ax ) 9 are equal.
Answer» Find a if the coefficients of x 2 and x 3 in the expansion of (3 + ax ) 9 are equal.

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