- #1

- 380

- 0

## Homework Statement

If V=x[tex]^{3}[/tex]f(y/x) show that x[tex]^{2}[/tex]V

_{xx}+ 2xyV

_{xy}+ y[tex]^{2}[/tex]V

_{yy}= 6V

## The Attempt at a Solution

i would normally just use the chain rule to differenciate this with respect to x and then so on but the f(y/x) is throwing me. Do i just treat the f like a constant or is it a whole new function which i have to differenciate first?

thanks

gf