Hi guys,

I have a problem trying to calculate the integral of this function:

$\displaystyle ln(h/z) $

This function is part of a physics problem, where h is a constant that determines the height.

In the solutions, the integral is supposed to be $\displaystyle z ln(h/z) + z $

I know that the integral of ln(x) is x(ln(x)-1)

What I got from calculating this function with the formula is:

$\displaystyle (-z ln(z)+z)/h $

I don't understand how to get to the solution $\displaystyle z ln(h1/z) + z $