- #1
Larsson
- 28
- 0
I have
y'' + 2y' - 3y = Dirac(t)
I use the laplacetransformation and get
s^2Y + 2sY - 3Y = 1
Y = 1/4 * 1/(s-1) - 1/4 * 1/(s+3) (skipped some steps)
I try to use inverselaplace and recieve
y = 1/4*exp(t) * H(t) - 1/4 * exp(-3t)*H(t)
Where H(t) is the heaviside function.
the correct answear should be 1/4*exp(t) *( H(t) -1) - 1/4 * exp(-3t)*H(t).
What am I doing wrong. They ask for "the limited solution" does that mean anything particulairy?
Thnx for any help
y'' + 2y' - 3y = Dirac(t)
I use the laplacetransformation and get
s^2Y + 2sY - 3Y = 1
Y = 1/4 * 1/(s-1) - 1/4 * 1/(s+3) (skipped some steps)
I try to use inverselaplace and recieve
y = 1/4*exp(t) * H(t) - 1/4 * exp(-3t)*H(t)
Where H(t) is the heaviside function.
the correct answear should be 1/4*exp(t) *( H(t) -1) - 1/4 * exp(-3t)*H(t).
What am I doing wrong. They ask for "the limited solution" does that mean anything particulairy?
Thnx for any help