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For questions that explicitly reference the binomial coefficients, Pascal's Triangle, and Binomial identities.

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Is there a simple proof of the following binomial Identity (part 2)?

Following the hint @darijgrinberg stated in the comment section with respect to the beauty inside the square brackets we focus on the sum and we obtain \begin{align*} \color{blue}{\sum_{k=m+ …
Markus Scheuer's user avatar