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Homework Help: Partial derivative

  1. Dec 5, 2009 #1
    1. The problem statement, all variables and given/known data



    2. Relevant equations

    3. The attempt at a solution

    I tried to use this definition:


    I'd be thankful, if somebody could show me the rules of differentiating y'.
  2. jcsd
  3. Dec 5, 2009 #2


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    Science Advisor
    Homework Helper

    You've got it. (y')'=y'', (y'')'=y'''. Etc. Don't forget to use the product rule on ty''.
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