若周期信号 是实信号和奇信号，则其傅里叶级数系数是：（ ）https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/904f7cd6e59b405a9e33824fa05a133b.png
举一反三
- 若周期信号 是实信号和奇信号，则其傅里叶级数系数是：（ ）[img=61x43]17a411ddfb9903f.png[/img]
- 下列信号中，_____周期信号。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/5f333529a6724b348f3719d4ad9cb2a7.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/baaca1beb7ea457eaf7544beec0fa639.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/2a8d2203eb2948ce8d95e650e32130f2.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/a2d52c07e1c54524b53b98cd92d39815.png">
- 下列信号中，哪一个是非周期信号？ A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/83f68e76be124295b0983618abb2469a.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/0d9998b227e44cf9923532daf025311e.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/a67487615b1248bd9a7978fa581f8821.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/14e55c6393c74631a39866e1b8befc89.png">
- 下列信号中，____是能量信号。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/e8fc82c3d7b046fc949119acef31f0f0.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/6085f08fa59b45e0ac501f77d9e9ac5c.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/450d1385152b4c67a5ec0e2e7a8f50d7.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/7a668260d2ea405ea903fc344f3ea5bc.png">
- 下列信号中，______是因果信号。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/56c3db40bb36428688799a6164924c2b.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/c775ed12f5af47549261ce4b9ae7c969.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/1a1575aacbdf4e95882a87cf2a5a7049.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201912/48b1a932dc504373ab3bf0e87edb513a.png">