모두CBT
L−1[s(s+1)2]\mathcal{L}^{-1}\left[\dfrac{s}{(s+1)^2}\right]L−1[(s+1)2s]는?
et−te−te^t-te^{-t}et−te−t
e−t−te−te^{-t}-te^{-t}e−t−te−t
e−t+te−te^{-t}+te^{-t}e−t+te−t
e−t+2te−te^{-t}+2te^{-t}e−t+2te−t