1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    User Avatar
    Homework Helper

    Welcome to PF, heahmad! :smile:

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


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    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

    User Avatar
    Homework Helper

    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?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook