O'Connor, John J. ; Robertson, Edmund F. , "Intermediate value theorem" , MacTutor History of Mathematics archive , University of St AndrewsWeisstein, Eric. "Mean-Value Theorem" . MathWorld . Wolfram Research
second edition by James Value Theorem (Rolle's theorem):supose that f is continuous on [a,b],and is differentiable on (a,b).if f(a)=f(b),then there is a number c ,a
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