设输出为y(t),输入为r(t)则 y(t)''+5y(t)'+6y(t)=r(t)在y(0)=y(0)'=0的条件下进行拉氏变换：Y(s)s^2+5Y(s)s+6Y(s)=R(s)所以传递函数为G(s)=Y(s)/R(s)=1/(s^2+5s+6)接着把常数函数6的拉氏变换带入上式,解出Y(s)再进行...