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Inverse Transformations of ODEs

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

    F(s) = s/((s-1)(s^2+1))

    F(s) = (s/(s^2+4s+5))(e^(-3s))


    2. Relevant equations

    Don't believe there are any.

    3. The attempt at a solution

    Not particularly sure. I can solve ((s-2)(e^-s))/(s^2-4s+3), but seem to be having problems with these.
     
  2. jcsd
  3. Apr 1, 2012 #2

    hunt_mat

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    Are you referring to Laplace transforms?
     
  4. Apr 1, 2012 #3
    Yes. I started the second by making the bottom more condensed and finding a G(s) separate of F(s), but am stuck here.
     
  5. Apr 1, 2012 #4

    hunt_mat

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    Homework Helper

    My advice is to use partial fractions on:
    [tex]
    \frac{s}{s^{2}+4s+5}
    [/tex]
    and use a look up table.
     
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