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Homework Help: Exact equations

  1. Mar 14, 2010 #1
    1. The problem statement, all variables and given/known data



    using the method of exact equations.

    2. Relevant equations

    I must use:


    3. The attempt at a solution

    The problem that I'm having is that I can't get the required partial derivatives to be equal to each other. How do can I change it so that N[tex]_{x}[/tex]=M[tex]_{y}[/tex]?

    When I started this problem initially, I got F(xy)=1, which is not right as 1 is not a function of xy (and I had forgotten to check that the partial derivatives were equal to each other) :P

    Please help. It's my first time here.

    And sorry, the superscripts are meant to be subscripts!
  2. jcsd
  3. Mar 14, 2010 #2


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    Homework Helper

    Since Nx is not equal to My, the equation isn't exact. Are you sure you copied the question correctly?
  4. Mar 14, 2010 #3
    Yes, that is the precise equation. And that's how I'm stuck.


    I read things in my textbook that says I could times the original equation by a factor that would result in the two partial equations being equal, but that doesn't seem to work in this case. I'm completely clueless.
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