Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Use of laplace to solve a differential equation

  1. Dec 18, 2009 #1
    I was asked to use a laplace transform to solve d^2x/dt^2 - 3(dx/dt) - 10x = e^-t
    with the initial conditions x(0) = 0 and x'(0) = 0

    I got down to (s^2)x(s) - sx(0) - x'(0) - 3(sX(0) - x(0)) - 10X =1/(s+1)

    I tried plugging in the initail conditions and didnt get the answer I was supposed to, think I have gone wrong somewhere if someone can help me out
  2. jcsd
  3. Dec 18, 2009 #2
    Got it wrong. That's:
    With the boundary conditions, you get
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook