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Laplace inital value help

  1. Dec 6, 2009 #1
    Laplace inital value help!!!

    1. The problem statement, all variables and given/known data
    y''+4y'+4y=(t-2)u(t-2)exp-(t-2)
    y(0)=1 y'(0)=-1

    what is the use of this u i have worked the problem to the following


    3. The attempt at a solution

    (s+2)^2*L(y)(s)= 5s-1 ....

    i have no idea how to approach the laplace ot the right side of the equation. some help please.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Dec 6, 2009 #2

    rock.freak667

    User Avatar
    Homework Helper

    Re: Laplace inital value help!!!

    L[f(t-a)H(t-a)]=e-atF(s).

    That will help you.
     
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