5. Continuity and Differentiation
medium

વિધેય $f\left( x \right) = \log x$ નો અંતરાલ $[1,3]$  માટે મધ્યકમાન પ્રમેય નો ઉપયોગ કરી $C$ ની કિંમત મેળવો.

A

$2{\log _3}e$

B

$\frac{1}{2}{\log _e}3$

C

$\;{\log _3}e$

D

${\log _e}3$

(AIEEE-2007)

Solution

$f^{\prime}(c)=\frac{f(b)-f(a)}{b-a}$

$=\frac{f(3)-f(1)}{3-1}$

$f^{\prime}(c)=\frac{\log _{e}^{3}-\log _{e}^{1}}{2}$

$\frac{1}{2} \log _{e}^{3} $

$\frac{1}{c}=\frac{1}{2} \log _{e} 3$

Standard 12
Mathematics

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