I am having trouble trying to prove this:

" u=xy, v=xy and z=f(u,v),

show that:

keep getting an answer of zero.

x(∂z/∂x) - y(∂z/∂y)=(x-y)∂z/∂u "

Please Help!

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- Oct 26th 2013, 05:30 AMlauramorrison93Chain rule: partial differentiation
I am having trouble trying to prove this:

**" u=xy, v=xy and z=f(u,v),**

show that:

keep getting an answer of zero.

x(∂z/∂x) - y(∂z/∂y)=(x-y)∂z/∂u "

Please Help! - Oct 26th 2013, 06:18 AMHallsofIvyRe: Chain rule: partial differentiation
That's because what you are trying to prove isn't true! I suspect that u was supposed to be x/y, not xy.