Hi.

I am presented with a function for which I know is homogeneous of degree 1. I'm having trouble proving it, however.

The function is:

$\displaystyle f(x,y) = x + ye^y^/^x .$

I also have to prove that if this is homogeneous of degree 1, then

f(x,y) = $\displaystyle x(df/dx) + y(df/dy)$

which I know utilizes the chain rule, but how do I start it? I have no clue.

Thanks for any help!