Inverse Laplace Transforms Problem 2

In summary, the conversation discusses the use of f(t) = (1/b-a)(e^-at-e^-bt) as a possible solution for f(s) = 6/s^2-9. The attempt at a solution involves replacing 6/s^2-9 with 6/(s-3)(s+3), plugging in values for a and b, and obtaining a final result of e^3t-e^-3t. It is suggested to double check this solution by taking its transform.
  • #1
Spoolx
38
0

Homework Statement


f(s) = 6/s^2-9


Homework Equations


I think
f(t) = (1/b-a)(e^-at-e^-bt)


The Attempt at a Solution


Replace 6/s^2-9 with 6/(s-3)(s+3)
a=-3
b=3

Plug in
(1(6)/3-(-3))(e^-(-3)t-e^-3t)

Final Result
e^3t-e^-3t
 
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  • #2
Spoolx said:

Homework Statement


f(s) = 6/s^2-9


Homework Equations


I think
f(t) = (1/b-a)(e^-at-e^-bt)


The Attempt at a Solution


Replace 6/s^2-9 with 6/(s-3)(s+3)
a=-3
b=3

Plug in
(1(6)/3-(-3))(e^-(-3)t-e^-3t)

Final Result
e^3t-e^-3t

It's easy enough for you to check it yourself. Take the transform of your answer and see it it gives what you started with.
 

Related to Inverse Laplace Transforms Problem 2

What is the purpose of solving Inverse Laplace Transforms Problem 2?

The purpose of solving this problem is to find the original function from its Laplace transform. This can be useful in many areas of science and engineering, such as solving differential equations and analyzing circuit systems.

What information is needed to solve Inverse Laplace Transforms Problem 2?

To solve this problem, you will need the Laplace transform of the function in question, as well as any other known information about the function, such as initial conditions or constants.

What is the general process for solving Inverse Laplace Transforms Problem 2?

The general process for solving this problem involves using techniques such as partial fractions, completing the square, and inverse Laplace transform tables to manipulate the given function and find the original function.

What are some common challenges when solving Inverse Laplace Transforms Problem 2?

Some common challenges when solving this problem include determining the correct techniques to use, dealing with complex numbers, and finding the inverse Laplace transform of more complicated functions.

How is Inverse Laplace Transforms Problem 2 related to other mathematical concepts?

This problem is closely related to other mathematical concepts such as integration, differential equations, and complex analysis. It also has applications in areas such as signal processing and control theory.

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