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The differential coefficient of f(logx...

The differential coefficient of `f(logx)` with respect to `x ,` where `f(x)=logx` is (a)`x/(logx)` (b) `(logx)/x` (c) `(xlogx)^(-1)` (d) none of these

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Given `f(x) = log x`
`f(log x ) = log log x`
Differentiate w.r.t.`x`
`f’(log x ) = (1/ log x)×(1/x) ` ...
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