If a and b are the coefficients of xn in the expansion of (1+x)2n and – InterviewSolution

1.	If a and b are the coefficients of xn in the expansion of (1+x)2n and (1+x)2n−1 respectively, find ab
Answer» If a and b are the coefficients of xn in the expansion of $(1 + x)^{2 n}$ and $(1 + x)^{2 n - 1}$ respectively, find $\frac{a}{b}$

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