Question

\[\mathcal L ^{-1} \lbrace \frac{s}{s^2 + 4s + 4} \rbrace\]

Answer 1

i got as far as \[\implies \mathcal L ^{-1} \left \lbrace \frac{s}{(s+2)^2} \right \rbrace\]
but after that i got nothing

Answer 2

maybe +2 - 2 in the numerator?

Answer 3

okay...i got \[e^{-2t} \cos t - 2e^{-2t} \sin t\]
that right?

Answer 4

ask wolf

Answer 5

i wish i could..idk how to do laplace transforms in wolf

Answer 6

ok let me check it.

Answer 7

http://www.wolframalpha.com/input/?i=inverse+laplace+tranform&f1=s%2F%28s%2B1%29^2&x=0&y=0&f=InverseLaplaceTransformCalculator.transformfunction_s%2F%28s%2B1%29^2&f2=s&f=InverseLaplaceTransformCalculator.variable1_s&f3=t&f=InverseLaplaceTransformCalculator.variable2_t