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Question

According to Lagrange's mean value theorem, given that all conditions are satisfied for f(x) in the interval [a,b], there exists at least one c such that f'(c) = , where a<c<b

A
f(b)bf(a)a
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B
f(b)f(a)ba
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C
f(a)f(b)bf(a)
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Solution

The correct option is B f(b)f(a)ba
According to Lagrange's mean value theorem, if f(x) is continuous in the interval [a,b] and differentiable in the interval(a,b), then there exists at least one value of c such that a<c<b and f(c)=f(b)f(a)ba

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