A) \[\frac{x}{\log x}\]
B) \[\frac{\log x}{x}\]
C) \[{{(x\log x)}^{-1}}\]
D) None of these
Correct Answer: C
Solution :
\[\frac{d}{dx}\log (\log x)=\frac{1}{x}.\frac{1}{\log x}={{(x\log x)}^{-1}}\]
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