若f(t)=f1(t)*f2(t),则有f(t)=f1(2t)*f2(2t)。
举一反三
- 已知f1(t)和f2(t)波形如下,若f(t)=f1(t)*f2(t),则f(0)= A: 1 B: 2 C: 3 D: 4
- 假设f1(t)和f2(t)如图所示,f(t)=f1(t)*f2(t),则f(1)= ( )[img=356x170]18037095681b0cf.png[/img] A: 2 B: -2 C: 4 D: -4
- f1(t)和f2(t)波形如图所示,f(t)=f1(t)*f2(t),则f(2)等于_____。[img=289x135]1803c9ee6bcc58c.png[/img] A: 0.5 B: 1 C: 1.5 D: 2
- 【多选题】若f 1 (t) = ɛ (-t) , f 2 (t) = e t ,则f 1 (t)* f 2 (t) = A. f 1 ꞌ (t)* f 2 (–1) (t) B. f 1 (–1) (t)* f 2 ꞌ (t) C. f 1 (t-3)* f 2 (t+3) D. f 1 (–3) (t)* f 2 ꞌꞌꞌ (t)
- 已知f1(t)和f2(t)波形如下,若f(t)=f1(t)f2(t),则f(0)=