1. Not finding help here? Sign up for a free 30min 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!

Where to start with laplace

  1. Dec 26, 2005 #1
    for the following question:
    let f(t)=t^2. derive L(f) from L(1)

    my problem:
    i have no clue where to start...
     
  2. jcsd
  3. Dec 26, 2005 #2
    You need to apply the "frequency division" rule :

    [tex]{ \cal L} \{ tf(t) \} = (-1) F^{'}(s)[/tex]

    [tex]{ \cal L} \{ t^nf(t) \} = (-1)^n F^{(n)}(s)[/tex]

    where

    [tex]{ \cal L} \{ f(t) \} = F(s)[/tex]

    and in this case

    [tex]f(t) = 1[/tex]

    marlon

    edit : all rules can be found here
     
    Last edited: Dec 26, 2005
  4. Dec 28, 2005 #3
    wow!!! thank you very much!!!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Where to start with laplace
  1. No idea where to start (Replies: 13)

  2. Where to start? (Replies: 1)

  3. Where to start? (Replies: 13)

  4. Where should I start? (Replies: 0)

  5. Unsure where to start (Replies: 1)

Loading...