• 2021-04-14
    已知f1(t)和f2(t)波形如下,若f(t)=f1(t)f2(t),则f(0)=
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    内容

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      若f(t)=f1(t)*f2(t),则有f(t)=f1(2t)*f2(2t)。

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      信号f1(t)和f2(t)如下图所示,f(t)=f1(t)*f2(t),则f(-...959aea343dbe4d9c.bmp

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      信号f1(t)和f2(t)如下图所示,f(t)=f1(t)*f2(t),则f(-1)等于http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/0749958f4da44655959aea343dbe4d9c.bmp

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      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

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      设:两信号f1(t)和f2(t)如图。则:f1(t)和f2(t)间的关系为() A: f(t)=f(t-2)ε(t-2) B: f(t)=f(t+2)ε(t+2) C: f(t)=f(2-t)ε(2-t) D: f(t)=f(2-t)ε(t+2)