1.

If \[f(x)={{\tan }^{-1}}\left\{ \frac{\log \left( \frac{e}{{{x}^{2}}} \right)}{\log (e{{x}^{2}})} \right\}+{{\tan }^{-1}}\left( \frac{3+2\log x}{1-6\log x} \right)\], then \[\frac{{{d}^{n}}y}{d{{x}^{n}}}\] is \[(n\ge 1)\]

A.            \[{{\tan }^{-1}}\{{{(\log x)}^{n}}\}\]
B.            0
C.            \[\frac{1}{2}\]
D.            None of these
Answer» C.            \[\frac{1}{2}\]


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