Uploaded June 2020 | Updated September 2026, 1 week ago

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Proof that rational numbers must have a repeating digit expansion: math.stackexchange.com/a/62046/713547

An interesting Putnam competition question about power series expansions and rational numbers. We actually get a really cool connection to the idea of repeating decimals!

Check out more calculus problems: youtube.com/playlist?list=PLug5ZIRrShJGFne7YhMi-4eYsUKzkITao

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Music: C418 - Pr Department