The coefficient of xm in (1+x)m+(1+x)m+1+⋯+(1+x)n, where m,n∈N and – InterviewSolution

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1.	The coefficient of xm in (1+x)m+(1+x)m+1+⋯+(1+x)n, where m,n∈N and m<n, is
Answer» The coefficient of $x^{m}$ in $(1 + x)^{m} + (1 + x)^{m + 1} + \dots + (1 + x)^{n},$ where $m, n \in N$ and $m < n$ , is

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