Thanks snipez, just what I needed. Which was basically to just start writing down the equation and its answers one line after another. Normally with these "show that if x and y then z" questions I can't see the answer coming until the last line, and this was no different.
- Toppers
Hi, I've got the following problem:
Show that if z = x^nf(u)
and u = y/x
then x\frac{\partial{z}}{\partial{x}} + y\frac{\partial{z}}{\partial{y}} = nz
I know partial differentiation fairly well, but I've never seen one laid out like this before, and am not too sure how to get started...