# Partial derivatives

• Apr 14th 2008, 11:22 AM
somestudent2
Partial derivatives
http://img292.imageshack.us/img292/7396/pdht7.jpg

I don't seem to understand the function here
• Apr 14th 2008, 12:43 PM
Peritus
just use the chain rule:

$
\begin{gathered}
f_x = g_u u_x + g_v v_x + g_w w_x \hfill \\
f_y = g_u u_y + g_v v_y + g_w w_y \hfill \\
\end{gathered}
$