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Rolle's theorem

[rohlz] /roʊlz/
noun, Mathematics
1.
the theorem that a differentiable function having equal values at the endpoints of an interval has a derivative equal to zero at some point in the interval.
Origin
1890-1895
1890-95; named after Michel Rolle (died 1719), French mathematician
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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