- #1

physics1000

- 69

- 4

I showed it partial derivatives exist at ##(0,0)##, also it is continuous as ##(0,0)##

but now I have to show if it differentiable or not at ##(0,0)##.

According to answers it is not and they proved by showing the vector coordinates at ##(1,1)## does not have a limit.

But I dont want a proof like that, I tried using definition and got stuck...

I know my Linear transformation is basically 0. but still got in trouble of the definition