Hi everyone,(adsbygoogle = window.adsbygoogle || []).push({});

We just started learning partial derivatives and I understand the f_{x}notation, but I'm confused when I'm asked for the value of f_{xy}. Does this mean multiply the two derivatives together?

For example:

What is f_{xy}when f(x,y) = (x+2y)ln(xy)

Thanks!

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Subscripts in partial derivative notation

**Physics Forums | Science Articles, Homework Help, Discussion**