Question

show z=f(x^(2)+y^(2)) equals y(dz/dx)-x(dz/dy)=0

Answer 1

z = f( x^2 + y^2) , use chain rule

Answer 2

hmmm, is z = f(x,y) ?

Answer 3

dz/dx = df/ du * du / dx

Answer 4

where u = x^2 + y^2

Answer 5

du/dx = 2x + 2y dy / dx

Answer 6

i needs to equal the second part somehow

Answer 7

i need to know if this is two variable or one variable calculus

Answer 8

multivariable / cal 3

Answer 9

oh , then you have partial derivatives