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Homework Help: Inverse Laplace Transform of (1/(s+s^3))?

  1. Dec 20, 2012 #1
    1. The problem statement, all variables and given/known data

    What is the inverse laplace transform of (1/(s+s^3))?

    2. Relevant equations

    3. The attempt at a solution

    I looked it up on wolframalpha and got 1-cos(t), but I don't understand how they got that answer. I looked up a basic laplace transform chart and didn't see anything that matched; also thought of using partial fractions to simplify it but that didn't work out.
  2. jcsd
  3. Dec 20, 2012 #2


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    I think you should try partial fractions again. It works out pretty easily that way. Show us what you did.
    Last edited: Dec 20, 2012
  4. Dec 24, 2012 #3
    Haha...I just realized I did my partial fraction decomposition wrong the first time -______- So mad...Thanks for the help!
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