Question

How do you solve `ln x - ln (1/x) = 2`?

Answer 1

`x=e`

Explanation:

As `lnx-ln(1/x)=2`

we have `ln(x/(1/x))=2`

or `lnx^2=2`

or `2lnx=2`

or `lnx=1`

and `x=e`