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∑j=lmC(j,l) \large \sum_{j=l}^m C(j,l) j=l∑mC(j,l)
Let C(j,l)C(j,l) C(j,l) denote the binomial coefficient, j!l!(j−l)!\frac{j!}{l!(j-l)!} l!(j−l)!j!. For integers m≥l≥0m\geq l \geq 0 m≥l≥0, what is the value of the summation above?
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