4.已知y(t) =f()* h() =f(r)h(t- r)d则f(-t)h(-tf(t) h(t)=f(3:)h(3t)=果请用y(t)表示
4.已知y(t) =f()* h() =f(r)h(t- r)d则f(-t)h(-tf(t) h(t)=f(3:)h(3t)=果请用y(t)表示
发布时间:2025-08-07 21:59:47
4.已知y(t) =f()* h() =f(r)h(t- r)d则f(-t)h(-tf(t) h(t)=f(3:)h(3t)=果请用y(t)表示