- #1

PlasticOh-No

- 18

- 0

Let's say we have

f[x_,y_]:= whatever

then we say

expr1 = D[f[x,y],x]

which is some complicated expression.

How can we get the answer in terms of f[x,y]? That is, how can we get expr1 to look like:

expr1 = f[x,y]*this term + pi*Sqrt[f[x,y]] + et cetera?

Thanks Gurus