Question

How do you find the second derivative of `x ln (x) - x`?

Answer 1

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

Explanation:

You find the second derivative by differentiating the function twice:

`f(x) =xlnx-x`

`f'(x) = lnx +x*1/x-1 = lnx`

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