# Math Help - Laplace transform

1. ## Laplace transform

Hi

I would like to pass to frequece domain the expressions below
if possible with step by step using Laplace transform, because
I not only want the answer, but also learn how to solve them:

7/s(s+30)

1/s^3

3pi/s^2 + 9pi^2

Moses

2. Have you not been taught how to get a frequency response from the Laplace transform representation of a transfer function?

(just replace $s$ by $i\omega$)

CB

3. Thank you for quick reply

Could you please check below and let me now if this is the right results

7/(+30)

1/^3

3pi/^2 + 9pi^2

4. Originally Posted by moisesbr
Thank you for quick reply

Could you please check below and let me now if this is the right results

7/(+30)

1/^3

3pi/^2 + 9pi^2
It is worth simplifying these, (and the last question looks like it has a typo) but they look OK. You might want to turn them into amplitude and phase form.

CB

5. Please let me know if simplification below is correct and whether
or not I can simplify beyond it:

7/(+30)
7/(^2+30)

1/^3
1/^3

3pi/^2 + 9pi^2
pi/^2 + 3pi^2