How do I show that the following function is differentiable at (0,0)?
{sin(xy)y,if y≠00,if y=0
I calculated the partial derivatives and
- f(x)=cos(xy) exists near (0,0) and is continuous
- f(y)=xycos(xy)−sin(xy)y2 exists, but how do I show that it is continuous?
No comments:
Post a Comment