Control systems Laplace question

[Chocolatecat]

(s^3 + 5s^2 +9s +7)/(s+1) (s+2). How do you find the inverse Laplace transform?

 

[3DDave]

Does this link work: https://www.symbolab.com/popular-calculus/calculus-81272

 

[rb1957]

I would question the equation ... are both (s+1) and (s+2) denominator terms ?

what examples of Laplace transformations have you done in class ? I can see a professional using a canned site (who's got time for grunt work ?)
But I would rather a student do the grunt work. At least I would want a student to check the canned solution, something like f(s)*(1/f(s)) = 1 (or whatever, IDK).

 

[pierreick]

Hi,
Another resource.

inverse Laplace transform (s^3 + 5s^2 +9s +7)/(s+1) (s+2) - Wolfram|Alpha

Wolfram|Alpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.

www.wolframalpha.com

Can you review your equation and confirm the position of (s+1) and (s+2), are they both on denominator and only (s+1)?

Pierre