- #1
klopez
- 22
- 0
Homework Statement
Show that the function is not differentiable at (0,0).
f(x,y) = [ (xy)/(x2 + y2)(1/2) if (x,y) =/ (0,0)
[ 0 if (x,y) = (0,0)
The Attempt at a Solution
I know that the partial derivatives at point (0,0) = 0, so I don't know why the function is not differentiable at (0,0). Is there a certain equation that will help me prove that?
Thanks