55.已知y(t)=(t)* h(t)f(r)h(t- r)则f(-1)h(-t)f(t)* h(t)=f(3t)*h(3t)=
55.已知y(t)=(t)* h(t)f(r)h(t- r)则f(-1)h(-t)f(t)* h(t)=f(3t)*h(3t)=
发布时间:2025-10-17 01:23:27
55.已知y(t)=(t)* h(t)f(r)h(t- r)则f(-1)h(-t)f(t)* h(t)=f(3t)*h(3t)=