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D.E.: Reduction of Order: Non-shortcut method question

  1. Feb 24, 2013 #1
    I don't know what to do with the x^3*e^x on the left side of the page. In the example the instructor gave for a different problem, you couldn't solve for x. In this problem you can so what does that mean I need to do with it?

    Qv1To7l.jpg
     
  2. jcsd
  3. Feb 25, 2013 #2
    Is this answer correct?
     
  4. Feb 25, 2013 #3
    Yes, it is :)
     
  5. Feb 25, 2013 #4
    So do you always just ignore the factor that doesn't contain the u(x) function like I just did in this example?
     
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