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Question

How do you find the Rolles value theorem applies?


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Solution

Rolle’s Theorem :

A special case of Lagrange’s mean value theorem is Rolle’s Theorem which states that:

If a functionf is defined in the closed interval[a,b] in such a way that it satisfies the following conditions.

i) The functionf is continuous on the closed interval [a,b].

ii)The functionf is differentiable on the open interval (a,b).

iii) Now if f(a)=f(b) ,

then there exists at least one value of x, let us assume this value to be c, which lies between a and b i.e. (a<c<b) in such a way that f'(c)=0.


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