Inverse Laplace- Partial Fractions with exponential

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SUMMARY

The discussion focuses on finding the inverse Laplace transform of the function \(\frac{e^{-2s}}{s^2+s-2}\). Participants emphasize the importance of factoring the denominator into \((s+2)(s-1)\) and utilizing partial fractions to simplify the expression. They highlight that the exponential term can be factored out, allowing for easier manipulation and inversion back into the time domain. The conversation reveals common challenges faced when dealing with exponential components in partial fractions.

PREREQUISITES
  • Understanding of Laplace transforms
  • Familiarity with partial fraction decomposition
  • Knowledge of exponential functions in the context of Laplace transforms
  • Basic algebraic manipulation skills
NEXT STEPS
  • Study the method of partial fraction decomposition for rational functions
  • Learn about the properties of the Laplace transform involving exponential functions
  • Explore examples of inverse Laplace transforms with exponential terms
  • Practice solving inverse Laplace transforms using MATLAB or Mathematica
USEFUL FOR

Students and professionals in engineering, mathematics, or physics who are working with Laplace transforms, particularly those facing challenges with exponential components in their calculations.

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Homework Statement


[e^(-2s)] / (s^2+s-2)
Find the inverse Laplace transform.


Homework Equations





The Attempt at a Solution


I know that I can factor the denominator into (s+2)(s-1). Then I tried to use partial fractions to split up the denominator, but I don't know how to do that with an exponential on the top. Thanks for any help!
 
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just write it as exp(whatever)*(1/whatever). Then do partial fractions to get exp(whatever)*(?/a + ?/b). You will see that the exponential will be easy to 'invert' back into the time domain as it corresponds to unit step functions (i believe).
 
Im stuck in the same boat, but trying to get the partial fraction for "(e^[-s] -e^[-2s])/[(s^2)(s+1)]"

I wasn't too sure what EngageEngage meant.
 
i am having the same problems! never knew there was any issue with partial fractions involving exponential components.

my question was to get partial fraction from 3e^-2s/(s(s+5)), so i brought down the exponential function to get 3 different fractions with 1/e^2s, 1/s and 1/(s+5).

But it still doesn't work out.
 

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