Rolle's Theorem Explained (with proof) | Calculus 1

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We introduce Rolle's theorem which we will later use in a proof of the Mean Value theorem. Rolle's theorem states that if a function is continuous on [a,b] and differentiable on (a,b), and f(a)=f(b), then there exists a point c in (a,b) so that f'(c)=0, that is - a place where the derivative is 0. We'll prove Rolle's theorem and go through two examples of using Rolle's theorem. In the first example we will find two x-intercepts of our function then use Rolle's theorem, and in the other example we will use Rolle's theorem to prove a cubic has only one root. #calculus1 #apcalculus

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0:00 Intro
0:15 Rolle's Theorem
1:00 Rolle's Theorem Visualized
2:27 Proof of Rolle's Theorem
5:33 Example 1 of using Rolle's Theorem
7:30 Example 2 of using Rolle's Theorem
10:25 Conclusion

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