1.

\[\frac{d}{dx}{{\log }_{\sqrt{x}}}(1/x)\]is equal to                                                         [AMU 1999]

A.            \[-\frac{1}{2\sqrt{x}}\]
B.            ? 2
C.            \[-\frac{1}{{{x}^{2}}\sqrt{x}}\]
D.            0
Answer» E.


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