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Undetermined coeff. solution

  1. Jul 19, 2011 #1
    1. The problem statement, all variables and given/known data

    I am stuck on this and just need to know the form of the solution for undetermined coeffecients of y''+y'+y=(1-e^-t)

    my guess is A-Ae^-t but im not sure
     
  2. jcsd
  3. Jul 19, 2011 #2

    Hurkyl

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    Well, what happened when you tried to work with your guess?
     
  4. Jul 19, 2011 #3
    it didnt work but i was just wondering if the 1 matters.
     
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