# Maths

posted by
**Claire**
.

If z=(x^n) f(x/y), where f is an arbitrary function, show that:

x(partial z/partial x) + y (partial z / partial y) = nz

Can someone please show me how to work it out? Thanks!

posted by
**Claire**
.

If z=(x^n) f(x/y), where f is an arbitrary function, show that:

x(partial z/partial x) + y (partial z / partial y) = nz

Can someone please show me how to work it out? Thanks!