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June 20th, 2018, 01:46 AM  #1 
Newbie Joined: Jun 2018 From: Brazil Posts: 1 Thanks: 0  Laplace
Given F (s) s2 / s ^ 2 + s + 1. Find the Laplace transform.

June 20th, 2018, 02:00 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,834 Thanks: 733 
You should clarify = sign and () missing.

June 21st, 2018, 03:22 AM  #3 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,264 Thanks: 902 
Surely you mean "inverse Laplace transform"? Assuming you mean $\displaystyle F(s)= \frac{s 1}{s^2+ s+ 1}$, start by completing the square in the denominator to get a form you can look up in a table of transforms. There is probably one in your text book but there is one here: http://tutorial.math.lamar.edu/pdf/Laplace_Table.pdf. I think you will need numbers "7" and "8" in that table. 

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