Given the transfer function G(s) of a system (3s+7)/(s(s+1)) A unit step u(t) is applied to the system’s input, then the time response y(t) is ( ).
A、y(t)=u(t)·(4+7t+4e-t);
B、y(t)=u(t)·(2+7t+7e-t);
C、y(t)=u(t)·(7+4t+4e-t);
D、y(t)=u(t)·(4-2t+e-t)
发布时间：2025-05-30 14:58:47
