某系統之閉迴路轉移函數可表為：(10s+100)/(s^2+19s+100)；當輸入(在時間t領域內)為r(t)=1時，則此系統之輸出(在複數s領域內)C(s)為何？ (A)(10s+100)/(s^2+19s+100) (B)(10s^2+100s)/(s^2+19s+100) (C)(10s+100)/)(s^3+19s^2+100s) (D)已上皆非

答：r(t)=1 經過拉式轉換，C(s)/R(s)=C(s)/s^-1
=> C(s)= (10s+100)/(s^2+19s+100) x s^-1 = (10s+100)/(s^3+19s^2+100s)
選(C)