모두CBT
f(t)=ke-at의 z 변환은?
Kzz−e−at\dfrac{Kz}{z-e^{-at}}z−e−atKz
Kzz+e−at\dfrac{Kz}{z+e^{-at}}z+e−atKz
zz−Ke−at\dfrac{z}{z-Ke^{-at}}z−Ke−atz
zz+Ke−at\dfrac{z}{z+Ke^{-at}}z+Ke−atz