KoMaL A776: BINOMIAL DOUBLE SUM (ft. generating functions)

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United States vEnhance (Evan Chen)
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Published on ● Video Link: https://www.youtube.com/watch?v=_sJ_T4SXzIo


Duration: 50:58
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Not snake oil for once. In this video, I solve a summation problem involving binomial coefficients.

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Come join my students in watching me be dumb on camera, whether it's missing MathCounts questions, misreading shortlist geometry problems, forgetting a Spawning Pool, running Baba into corners, and more!



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