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Homework Help: Differentials Equation Help

  1. Oct 21, 2009 #1
    1. The problem statement, all variables and given/known data
    I have two problems from my differential equations assignment that I'm having difficulty with. I would appreciate some guidance!

    2. Relevant equations

    http://img10.imageshack.us/img10/3397/questionsk.th.jpg [Broken]

    3. The attempt at a solution
    for no.10 I used reduction of order with the assumption that one solution is y1=e^x
    I got y2=xe^x

    my question is for this question do I solve the unhomogenous equation by variation of parameters to solve for the particular solution And from there use it for the General Solution ? ( yg= yh+yp.

    For no.7
    I multiplied by x^p y^q and found the partial derivatives My and Nx.
    Inorder for it to be exact, I equated the partial derivatives and found my values for p and q. They came out to being fractions and my final solution is extremly messy with fractions. Is this is correct approach?

    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Oct 22, 2009 #2


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    Science Advisor


    Did you get 3q= 2(p+1) and 20(q-1)= 12(p+ 3)? That's what I got. Yes, those give "messy" fractions.

    Last edited by a moderator: May 4, 2017
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