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Ahh this one has been bugging me!

  1. Dec 7, 2007 #1
    Δƒ/Δx and Δƒ/Δy. ƒ(x,y) = xy² + x²y

    anyone able to calculate?
  2. jcsd
  3. Dec 7, 2007 #2
    I'm not sure what you mean by [tex]\frac{\Delta f}{\Delta x}[/tex]. Do you mean [tex]\frac{\partial f}{\partial x}[/tex]?

    At any rate, why don't you tell us what you've tried and where you get stuck?

    http://www.physicallyincorrect.com/" [Broken]
    Last edited by a moderator: May 3, 2017
  4. Dec 7, 2007 #3


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    Whether you mean the partial derivatives or the "difference quotients" those are both pretty straightforward by methods you learned in elementary calculus. How have you tried to do them?
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