Inverse Laplace Transform

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dizzy

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Apr 8, 2015
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4
Hi,

Can anyone advise me on how to solve this problem ?

F(s) = 1/[(s+2)(s^2 + 8s + 25)]

Can i use the method of A + B and covering up rule ?


Thank you guys. Really need help !
 
i tried using partial fractions and the cover up rule. But somehow my numbers were too big for me to covert base on the chart.
 
dizzy said:
Hi,

Can anyone advise me on how to solve this problem ?

F(s) = 1/[(s+2)(s^2 + 8s + 25)]

Can i use the method of A + B and covering up rule ?


Thank you guys. Really need help !
Click to expand...

Use method of partial fractions (I do not know the "method of A + B and covering up rule")
 
Subhotosh Khan said:
Use method of partial fractions (I do not know the "method of A + B and covering up rule")
Click to expand...

Hi Subhotosh,

Can i do it by

= 1/(s+2) + 1/(s2 + 8s +25)
= 1/(s+2) + 1/(s + 4)2 + 9
= ....

Is this the correct way of doing it ?
 
dizzy said:
Hi Subhotosh,

Can i do it by

= 1/(s+2) + 1/(s2 + 8s +25)
= 1/(s+2) + 1/(s + 4)2 + 9
= ....

Is this the correct way of doing it ?
Click to expand...

Yes and NO....

F(s) = 1/[(s+2)(s^2 + 8s + 25) = A/(s + 2) + (Bs + C)/(s^2 + 8s + 25)

Now solve for A, B and C ....
 
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