求图所示 [tex=2.071x1.357]tibrCRwNLzDQQYea733HmQ==[/tex] 的傅里叶逆变换 [tex=1.643x1.357]Wfem9oxh0ZS7nZ3KGomKoQ==[/tex][img=409x217]17a45fa3efa5834.png[/img]

2022-06-07

求图所示 [tex=2.071x1.357]tibrCRwNLzDQQYea733HmQ==[/tex] 的傅里叶逆变换 [tex=1.643x1.357]Wfem9oxh0ZS7nZ3KGomKoQ==[/tex][img=409x217]17a45fa3efa5834.png[/img]

答案：

解： (b)[tex=38.286x9.143]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[/tex]

举一反三

内容

0
[img=170x106]17ae6b32c8864fe.png[/img]已知 [tex=1.643x1.357]Wfem9oxh0ZS7nZ3KGomKoQ==[/tex] 的波形如图题所示, 求 [tex=2.5x1.429]79SmwT+8J9VTqKDgDEyFq3k64q+Kpuk4WGGtqKZxc9U=[/tex]并画出 [tex=2.214x1.429]79SmwT+8J9VTqKDgDEyFq4Od+D7HyGfh3gUh4/tI68w=[/tex] 的波形图。
1
求下列时间函数[tex=1.643x1.357]Wfem9oxh0ZS7nZ3KGomKoQ==[/tex] 的拉氏变换[tex=1.929x1.357]CsHYmgN8a4Yt6bxTnBWLzw==[/tex].[tex=4.857x1.5]LEBgqjtc0uD467ch5lj0m+acby1R/ZP7Lp/bAklVN/0=[/tex]
2
利用 [tex=1.643x1.357]Wfem9oxh0ZS7nZ3KGomKoQ==[/tex] 的对称性, 定性判断图 [tex=1.786x1.143]+BQXX3wTTFDOh1JtxMNnWw==[/tex] 中各周期信号的傅里叶级数中所含有的频率分量。
3
已知 [tex=3.429x1.357]DUsCaPy8+W8YkjbY5ijJ3g==[/tex] 的波形如图 1-16 所示, 试绘出 [tex=1.643x1.357]Wfem9oxh0ZS7nZ3KGomKoQ==[/tex] 的波形。[img=224x198]17a2e271ab8cb3f.png[/img]
4
信号 [tex=1.643x1.357]Wfem9oxh0ZS7nZ3KGomKoQ==[/tex] 如图 1-15 所示, 概略画出下面信号的波形图:[img=261x247]17a2e1414696e1c.png[/img] [tex=3.429x1.357]zdwAqYmmLWLRV77CjMRW6Q==[/tex]