In the following mechanism, it has redundant constraints.[img=185x179]1803a1af94d1dec.png[/img]
A: 0
B: 1
C: 2
D: 3
A: 0
B: 1
C: 2
D: 3
举一反三
- The number of redundant constraints in the system is ()[img=302x298]1803a03a986d743.png[/img] A: 1 B: 2 C: 3 D: 4
- 18033c930e93fcd.png,[img=41x25]18033c9316fa030.png[/img]是其DFT。[img=143x27]18033c932578741.png[/img],不计算IDFT,确定6点序列[img=28x25]18033c93359b91a.png[/img]为______。 A: {0, 0, -3, 1, -1, 2} B: {0, 0, 3, 1, -1, 2} C: {3, 0, 0, 1, -1, 2} D: {3, 0, 0, -1, 1, 2}
- 17d602bb94f22b8.png,[img=41x25]17d602bba3f55ff.png[/img]是其DFT。[img=143x27]17d602bbb4dbc72.png[/img],不计算IDFT,确定6点序列[img=28x25]17d602bbc24590d.png[/img]为( )。 A: {3, 0, 0, 1, -1, 2} B: {0, 0, -3, 1, -1, 2} C: {0, 0, 3, 1, -1, 2} D: {3, 0, 0, -1, 1, 2}
- 已知[img=198x47]1803dcb3b5eac0d.png[/img],则x(0)=(),x(1)=() A: -1 B: 2 C: 0 D: 1
- 已知[img=198x47]1803567330563e5.png[/img],则x(0)=(),x(1)=() A: -1 B: 2 C: 0 D: 1