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My coauthor Dave Perkinson made this diagram to explain the binomial theorem and I think it's the perfect distillation. Here's our draft book, Discrete Structures, if you want more: kyleormsby.github.io/files/113spr... 🧮

david (cheryl reeve stan account)

@transfersystem.bsky.social

18 Feb

this is really cool! i like it as an intuitive explanation of the sum of binomials identity

ꭓle Ormsby 𓆙

@e-infinity.space

Yes! My students learn that first as an application of 'additive counting' — partition the 2ⁿ subsets of an n-element set by cardinality — and they see the algebraic proof later. Then I make them decide which proof they like better :)

18/2/26, 5:43 pm0 reposts4 likes

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