모두CBT
F(s)=s+1s2+2sF(s)=\dfrac{s+1}{s^2+2s}F(s)=s2+2ss+1로 주어졌을 때 F(s)의 역변환은?
1/2(1+et)
1/2(1+e-2t)
1/2(1-e-t)
1/2(1-e-2t)