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
A: 1
B: 2
C: 3
D: 4
B
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)=
- 已知f1(t)和f2(t)波形如下,若f(t)=f1(t)*f2(t),则f(0...8f547dd1af821f92.bmp
- 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
- 已知f1(t)和f2(t)波形如下,若f(t)=f1(t)*f2(t),则f(0)=http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/e38151c6fa664a008f547dd1af821f92.bmp
内容
- 0
【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)
- 1
若f(t)=f1(t)*f2(t),则有f(t)=f1(2t)*f2(2t)。
- 2
f(t)为原始信号,f1(t)为变换信号,则f1(t)的表达式是( )。[img=722x219]17de73b5129ea9f.png[/img] A: f(t/2 + 1) B: f(-t/2 - 1) C: f(-2t+1) D: f(-t/2 + 1)
- 3
f(t)为原始信号,f1(t)为变换信号,则f1(t)的表达式是( )。[img=722x219]1803709447eacc9.png[/img] A: f(t/2 + 1) B: f(-t/2 - 1) C: f(-2t+1) D: f(-t/2 + 1)
- 4
信号f1(t)和f2(t)如下图所示,f(t)=f1(t)*f2(t),则f(-1)等于[img=647x315]17869c198f03a3c.bmp[/img] A: -1 B: -0.5 C: 1 D: 1.5