AMaths Qn

How to do this A math q:

Find an expression f(x) such that

d/dx [ f(x)] = 1 / xlnx

Hi,

Notice that 1 / (x ln x) may be rewritten as (1 / x) / (ln x).

Then recall that the derivative of ln f(x) is f'(x) / f(x).

Thanks.

Cheers,
Wen Shih