Question

Answer Preview Result Entered ([e^(-8*s)]- [e^(-5*s)])* [1/(s^2)]+ (5* , 3e 8s (5e-5s – 8e-88) ) - + incorrect Ile-88 - e-5s [e^(-5*s)]-8* [e^(-8*s)])* (1/s)+[(3* [e^(-8*s)])/s] The answer above is NOT correct. (1 point) Find the Laplace transform F(s) = L {f(t)} of the function f(t) = (5 – t)(u(t – 5) – uſt – 8)), for s + 0. F(S) = L {f(t)} = [e^(-88)-e^(-5s)](1/s^2)+[5e^(-5s)-8e^(-88)](1/s)+3(e help (formulas)

This is my answer but it shows that it is wrong. My professor instructs me that for these questions, you first need to multiply (5-t)u(t-5)-(5-t)u(t-8)

Then g(t)=5-t. This will become

e^(-5s)L{g(t+5)}-e^(-8s)L{g(t+8)}

Take the Laplace transform

Please help.

Answer 1

fet)= (5-4) (uct-5) - uCt-8)) = (5-t) uct-5) - (5-t)ult-8) 0.444) 255 , 045-2285