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Examine the validity of Lagrange's mean ...

Examine the validity of Lagrange's mean value theorem for the function `f(x) = x^(2//3)` in the interval `[-1, 1]`.

A

(0,0) is a point of maximum

B

(0,0) is not a point of minimum

C

(0,0) is a critical point

D

There is no crtical point

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The correct Answer is:
C
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