need help(adsbygoogle = window.adsbygoogle || []).push({});

compute the laplace transform of

h(t)= -5t^2

I took the integral((-5t^2)e^-(st)) i forgot integration by parts so i did it the hard way in my head and finally got

lim t -> oo 5[(-1/s)(t^2)(e^-st) - (2te^-st) - (2se^-st)] 0--oo

i got 10s but the book says -10/s^3

did i get the inetgration wrong or is it the second part thats wrong

i also have to verify that L[t^n]= n!/s^(n+1) basicaly the same problem but general

muchos gracias and stuff

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Need help compute the laplace transform

**Physics Forums | Science Articles, Homework Help, Discussion**