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WebGraphing.com Forum » List all forums » » Forum: Calculus Homework Help » » » Thread: I really don't get partial derivatives... » » » » Post: I really don't get partial derivatives... |
| Posted by ChanMik at Jan 16, 2008 11:34:51 AM |
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I really don't get partial derivatives... Partial Derivatives Consider f(x,y) = x^2y / x^2 + y^2 (x,y) does not equal (0,0) and f(x,y)= 0 (x,y)=(0,0). Find the partial derivative df/dx (0,0) and df/dy (0,0) using the definition of the partial derivative of the limit. Gradients 1. f (x,y,z) = xy^2 - y^3z^2 2. g (x,y,z) = ln (?x^2 + y^2 + z^2) 3. h (x,y,z) = 1 / (?x^2 + y^2 + z^2) 4. h (x,y,z) = ( ?x^2 + y^2 + z^2)n , n is greater than or equal to 2 |