Consider f(x) = 0. f'(x) = 0, so never changes sign. f has infinitely many zeros... | Hacker News

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erehweb on July 10, 2013 | parent | context | favorite | on: Math, Science Popular Until Students Realize They’...

Consider f(x) = 0. f'(x) = 0, so never changes sign. f has infinitely many zeros.

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