- #1
Callisto
- 41
- 0
Hi
" A function f is called homogeneous of degree n if it satisfies the equation
f(tx,ty,tz)=t^n*f(x,y,z) for all t, where n is a positive integer and f has continuous second order partial derivatives".
I don't have equation editor so let curly d=D
I need help to show that
x(Df/Dx)+y(Df/Dy)+z(Df/Dz) = nf(x,y,z)
The hint that is given is to use the chain rule to differentiate f(tx,ty,tz) with respect to t.
I am at a total loss, can somebody offer help as to how i show this.
Thanks
Callisto
" A function f is called homogeneous of degree n if it satisfies the equation
f(tx,ty,tz)=t^n*f(x,y,z) for all t, where n is a positive integer and f has continuous second order partial derivatives".
I don't have equation editor so let curly d=D
I need help to show that
x(Df/Dx)+y(Df/Dy)+z(Df/Dz) = nf(x,y,z)
The hint that is given is to use the chain rule to differentiate f(tx,ty,tz) with respect to t.
I am at a total loss, can somebody offer help as to how i show this.
Thanks
Callisto