- #1
Pouyan
- 103
- 8
Homework Statement
We want to find the Laplace transform for
f(t): 0 for t≤2 and (t-2)2 for t≥2
Homework Equations
I know that Lap{uc f(t-c)} = e-csLap{f(t)}=e-csF(s)
I rewrite f(t)=0+g(t) where g(t) = 0 for 0≤t<2 and (t-2)2 for t≥2
so we can write f(t)=g(t)= u2(t)*(t-2)2
Lap{f(t)}= (e-2s/s) * Lap{(t-2)2}
The Attempt at a Solution
The answer in my bok is 2*(e-2s)/(s3)
But Lap{(t-2)2} is (2/s3) - (4/s2)+(4/s)
why ?!