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justaguide eNotes educator| Certified Educator

The function `f(x) = ln (ln x)` has to be differentiated. Use the chain rule.

`f'(x) = (1/ ln x)*(1/x) = 1/(x*ln x)`

The derivative of `f(x) = ln (ln x)` is `f'(x) = 1/(x*ln x)`

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