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Homework Help: Have to find three ways of solving (only have one successful)

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

    x*y'' - y' = 3x^2

    3. The attempt at a solution

    so far i have used cauch-euler and solved it. i was trying to use linear de and power series to solve, but with little success. Am i on the right track? If not, which method should i be using to find the solution?
  2. jcsd
  3. May 1, 2010 #2


    Staff: Mentor

    I don't recall the Cauchy-Euler method is, so if that worked for you, great. Power series should work, so if you're having problems, show us what you've done.

    You can also make the substitutiion u = y', u' = y'' to make the equation first order, and find an integrating factor. Once you have found u, integrate to get y.
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