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# Solution for F(X) = 3 + (X − 2)2/3 on [1, 3] Discuss the Applicability of Rolle'S Theorem for the Following Function on the Indicated Intervals ? - CBSE (Science) Class 12 - Mathematics

ConceptMaximum and Minimum Values of a Function in a Closed Interval

#### Question

f(x) = 3 + (x − 2)2/3 on [1, 3] Discuss the applicability of Rolle's theorem for the following function on the indicated intervals ?

#### Solution

The given function is $f\left( x \right) = 3 + \left( x - 2 \right)^\frac{2}{3}$  Differentiating with respect to x, we get

$f'\left( x \right) = \frac{2}{3} \left( x - 2 \right)^\frac{2}{3} - 1$

$\Rightarrow f'\left( x \right) = \frac{2}{3} \left( x - 2 \right)^\frac{- 1}{3}$

$\Rightarrow f'\left( x \right) = \frac{2}{3 \left( x - 2 \right)^\frac{1}{3}}$

Clearly, we observe that for = 2

$\in \left[ 1, 3 \right]$ $f'\left( x \right)$ does not exist.

Therefore,  $f\left( x \right)$ is not derivable on $\left[ 1, 3 \right]$

Hence, Rolle's theorem is not applicable for the given function.

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#### APPEARS IN

Solution F(X) = 3 + (X − 2)2/3 on [1, 3] Discuss the Applicability of Rolle'S Theorem for the Following Function on the Indicated Intervals ? Concept: Maximum and Minimum Values of a Function in a Closed Interval.
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