1. ## Finding integral:

1/(xlnx)

Step by step if you can please.

2. $\displaystyle \int{\frac{1}{x\ln{x}}\,dx} = \int{\frac{1}{\ln{x}}\,\frac{1}{x}\,dx}$.

Now make the substitution $\displaystyle u =\ln{x} \implies \frac{du}{dx} = \frac{1}{x}$.

3. Hint: $\displaystyle \int\frac{1}{x\ln{x}} \;{dx} = \int\frac{(\ln{x})'}{\ln{x}}\;{dx}$.