Inverse laplace transform without partial fractions

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SUMMARY

The discussion focuses on finding the inverse Laplace transform of the function 6/[s^4(s-2)^2]. Participants suggest two primary methods: using partial fractions and evaluating the Bromwich integral. One participant proposes rewriting the function as 6/s^4 * 1/(s-2)^2 to apply Laplace transform tables and then using convolution to obtain the final result. The conversation emphasizes the effectiveness of these techniques in solving the given problem without relying solely on partial fractions.

PREREQUISITES
  • Understanding of inverse Laplace transforms
  • Familiarity with partial fraction decomposition
  • Knowledge of the Bromwich integral
  • Experience with convolution in Laplace transforms
NEXT STEPS
  • Study the application of the Bromwich integral in inverse Laplace transforms
  • Learn about convolution theorem in Laplace transforms
  • Explore Laplace transform tables for common functions
  • Practice problems involving partial fractions in Laplace transforms
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Students and professionals in engineering, mathematics, and physics who are working on inverse Laplace transforms, particularly those looking to deepen their understanding of alternative methods beyond partial fractions.

shreddinglicks
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Homework Statement


take inverse laplace of:

6/[s^4(s-2)^2]

Homework Equations


6/[s^4(s-2)^2]

The Attempt at a Solution


I used partial fractions. I was wondering if It could be manipulated to where I could use the laplace table?
 
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If you don't want to use partial fractions, you could evaluate the Bromwich integral:
$$\frac{1}{2\pi i}\int_{\sigma-i\infty}^{\sigma+i\infty} \frac {6 e^{st}}{s^4(s-2)^2}\,ds$$
 
shreddinglicks said:

Homework Statement


take inverse laplace of:

6/[s^4(s-2)^2]

Homework Equations


6/[s^4(s-2)^2]

The Attempt at a Solution


I used partial fractions. I was wondering if It could be manipulated to where I could use the laplace table?
You could write it as$$
\frac 6 {s^4}\cdot \frac 1 {(s-2)^2}$$inverse both factors using table methods, and take the convolution for your answer. Not sure it would be any easier though.
 

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