# Video: Rapid calculus - Rolle's Theorem

Video tutorial on how to use Rolle's theorem to find a point c in the interval where the function has a horizontal tangent line, in other words, where it has a critical point at which the function has a local maximum or minimum and where it changes direction from increasing to decreasing or vice versa.

Last updated Sep 6, 2013,
created Sep 6, 2013

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