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Partial derivatives

  1. Apr 8, 2010 #1
    Do I need to use Schwarz's or Young's theorems to prove it, if don't then do I need to evaluate them on (0,0) using definition.

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  2. jcsd
  3. Apr 8, 2010 #2


    Staff: Mentor

    I would start by taking the mixed partials (fxy and fxy) for each of the given functions, and evaluating these partials at the origin.
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