$$ \left(\begin{array}{c}a+b\\ n\end{array}\right) = \sum_{i=0}^n \left(\begin{array}{c}a\\ k\end{array}\right) \left(\begin{array}{c}b\\ n-k\end{array}\right)$$
2026-04-06 20:41:18.1775508078
How can I prove this equation is correct?
29 Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail AtRelated Questions in BINOMIAL-COEFFICIENTS
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