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Homework Help: Ordenary differential equation

  1. May 15, 2003 #1
    Hi,
    I have the following ODE, which I could not solve,
    (7x^3+3x^2y+4y)dx+(4x^3+x+5y)dy=0.
    I have tried to use the integration factor technique, but I could not find one.
    It can be put in the form:
    M dx +N dy=0, where M=7x^3+3x^2y+4y, and N=4x^3+x+5y.
    Can you help me? And How can it be done on mathematica? (or MuPAD)

    hhegab
     
  2. jcsd
  3. May 15, 2003 #2

    Tom Mattson

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    I don't see any way to make this equation exact either. Were you given any initial conditions, or are you to find a general solution? The reason I ask is that, if you were, we may be able to use an integral transform.

    Sorry, but I don't know how to use Mathematica.
     
  4. May 15, 2003 #3
    Dear Tom,
    This problem appears in my book! I have struggled with it for 2 months (and I shouldn't have done).
    Well, I guess I will stop now.
    PS.
    It is said that it has an integration factor !!! I have done my best to find it, but it was not there.

    hhegab
     
  5. May 16, 2003 #4

    Tom Mattson

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    2 months?! Egad!

    I will wrestle with this some more over the weekend. Take a break! :wink:
     
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