[理工] 訊號time invariant定義
題目是這張圖片的P-5.9
http://i.imgur.com/dbfTqsM.jpg
我的疑問是第a個位甚麼不是time-invariant
解答在這邊
http://i.imgur.com/yKwdAsk.png
可能我沒有看懂解答,也有可能解答錯了,求解惑
謝謝
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05/08 00:08, , 1F
05/08 00:08, 1F
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05/08 00:09, , 2F
05/08 00:09, 2F
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05/08 00:11, , 3F
05/08 00:11, 3F
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05/08 00:12, , 4F
05/08 00:12, 4F
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05/08 00:12, , 5F
05/08 00:12, 5F
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05/08 18:16, , 6F
05/08 18:16, 6F