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Partial Derivatives Challenge Question

  1. Nov 7, 2007 #1

    I find this question to be extremely challenging...

    The best I can think of is z=f(x,y)=ln(theta), would this work?

    Can someone teach me how to define S=domain of f? This problem is giving me bad headaches.

    It would be nice if someone can guide me through the solution.

    Thanks a million!
  2. jcsd
  3. Nov 8, 2007 #2
    I find it difficult. Anyone willing to take up this challenge?
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