
PreCalculus PreCalculus Math Forum 
 LinkBack  Thread Tools  Display Modes 
January 8th, 2018, 03:41 AM  #1 
Newbie Joined: Jan 2018 From: Poland Posts: 4 Thanks: 2  Inverse laplace transform, formula help me a little ;)
I have to find y, but I don't have a formula to solve that one, if anyone have an idea... y=L−1[(e−2πs*s−2)/(s2+4)] Last edited by skipjack; January 8th, 2018 at 06:05 AM. 
January 8th, 2018, 04:00 AM  #2 
Senior Member Joined: Oct 2009 Posts: 436 Thanks: 147 
Just to make sure, you are talking about $$\mathcal{L}^{1}\left(\frac{e  2\pi s^2  2}{s^2 + 4}\right)$$ Last edited by Micrm@ss; January 8th, 2018 at 04:03 AM. 
January 8th, 2018, 04:30 AM  #3 
Newbie Joined: Jan 2018 From: Poland Posts: 4 Thanks: 2 
oops no, it is not that, it is hard to write it here but that one is correct L−1[(e^(2πs2s))/(s^24)] 
January 8th, 2018, 06:25 AM  #4 
Global Moderator Joined: Dec 2006 Posts: 19,299 Thanks: 1688 
Use the entries numbered 17 and 27 in this list of Laplace transforms.

January 8th, 2018, 08:31 AM  #5 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,921 Thanks: 883  
January 8th, 2018, 08:57 AM  #6 
Newbie Joined: Jan 2018 From: Poland Posts: 4 Thanks: 2 
L1 is an inverse of laplace transformation it should be L to the power of 1
Last edited by Justinetea; January 8th, 2018 at 09:02 AM. 
January 8th, 2018, 09:18 AM  #7 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,921 Thanks: 883 
Well, post it this way: L^(1) or 1/L

January 8th, 2018, 10:09 AM  #8 
Senior Member Joined: Sep 2015 From: USA Posts: 2,042 Thanks: 1064  I'm afraid I have to disagree with you Sir Denis. Writing the inverse of a transform $\mathscr{L}$ as $\dfrac {1}{\mathscr{L}}$ gets you sent to the corner. If I was writing in charcoal in my cave I would write it as L^(1){} (your first choice) Using LaTex I'd write it as $\mathscr{L}^{1}()$ 
January 8th, 2018, 11:19 AM  #9 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,921 Thanks: 883  
January 8th, 2018, 03:20 PM  #10 
Senior Member Joined: Sep 2015 From: USA Posts: 2,042 Thanks: 1064  

Tags 
formula, inverse, laplace, transform 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Relatioship between Laplace and Inverse Laplace Transform from tables  szz  Differential Equations  1  November 2nd, 2014 03:18 AM 
ODE and Inverse Laplace Transform  szz  Calculus  1  November 1st, 2014 03:14 PM 
Inverse Laplace Transform  Bkalma  Calculus  1  May 6th, 2014 07:08 PM 
inverse laplace transform  capea  Complex Analysis  5  August 3rd, 2013 02:30 PM 
Laplace tranform and inverse of Laplace transform  Deiota  Calculus  1  April 28th, 2013 10:28 AM 