I am sorry that I cannot find out any mistake in the proof
Consider the following proof of the mean vale theorem for definite inteprals: Let By the Fundamcatal Thcorem of Caulus, F(x) is continuous on [a,b], diffrcutiabl in (a,b) with Fr)-fix), and Heoce by Lagrange caalue theorem, there exists cea,) such tha e)-Fe)-)-Fa)I Is there any prohlem with this pronf? Ifsa, briefly explain why
