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Homework Help: Inverse Laplace transform

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

    Compute the inverse Laplace transform of

    2. Relevant equations

    http://img267.imageshack.us/img267/696/66451772.png [Broken]

    3. The attempt at a solution
    I tried using partial fraction but no luck.
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Dec 19, 2011 #2

    I like Serena

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    Welcome to PF, heahmad! :smile:

    Partial fraction decomposition should work.
    How did you try it?
     
  4. Dec 19, 2011 #3

    vela

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    Those transforms are already in the form you'd get from a partial fraction expansion so trying to expand them again should simply result in what you started with. Now it's just a matter of inverting each term using the table. Where are you getting stuck?
     
  5. Dec 20, 2011 #4
    if i use Partial fraction decomposition, all fraction become zero!!!!
     
  6. Dec 20, 2011 #5

    I like Serena

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    vela is right.
    Partial fraction decomposition does not work here.
    You need a Laplace transform table.

    But the fractions do not become zero.
    How did you find zero?
     
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