- #1
Kuma
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- 0
Homework Statement
The question asks:
f(x,y) = 3xy+5y^3/[x^2+y^2] when (x,y) =! (0,0)
f(x,y) = 0 when (x,y) = (0,0)
what is df/dy at (0,0)?
Homework Equations
The Attempt at a Solution
I'm not sure what the answer is. At 0,0 f(x,y) is 0, so it's simply a point and the function is not continuous at the point, therefore df/dy doesn't exist?