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The Lagrange's mean value theorem is not...

The Lagrange's mean value theorem is not applicable to f(x) in [2, 4], if `f(x)` is

A

`f'(c)=0`

B

`f'(c)=f(b)-f(a)`

C

The tangent at x=c to the curve y=f(x) is parallel to the chord joining x=a,x=b

D

The tangent at x=c to the curve y=f(x) is perpendicular to the chord joining x=a,x=b

Text Solution

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The correct Answer is:
C
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