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![請問這題a為何用DTFT再逆轉換算出來y[n]=0與解答用z轉換結果不同 - 1](https://d1e9oo257tadp1.cloudfront.net/uploads/qa_question_image/file/1632664/thumb_l_webp_DF4BDA4F-2714-49E2-A110-51639BE960A0.webp?Expires=1712483452&Signature=cyfKYIcHJNoWUjh3l7-GaekLG1nlOYDwkFTUIDjQIWx-dj2uHjRCAxMsn3VcEHDtJ9Pgi64S2dihPCXL0-Fw8e-TuMDdzS52z0ukGmHyiQC0HttqGwHMlGKeGZzWuDKzQItJ9wpll19u6UNuNAmzktstL6~zDEX0ZdZJRLnR0-h8ebK-49vx7aCs2ygUaWlYClwX38SjNnaBqDrT55Vr9h9H4tK1M-kO71Y04HbfLawqrKDs~diGuH-b7St~HpR7rCHwVQ2a4bctmhf6xbL-hNqUq8JZxDd7EiknjdaBjJ2UDjYDzWXBx~W-4oWmBp1-qiBc6w9x9z8SSF~QLi879A__&Key-Pair-Id=K2W722D70GJS8W&Expires=1712483452&Signature=oRUc08pLM2RFybH8o9fgdEYrBxy3wy-0i4Yq28WRZP23cA17M~0Q7O8lAM7tT4BpL3Ygs5pWKyVau5DPGO855QQ26o5RQOR61g9mxrfI28TTwfnmq8WMSMFE3dGl2LoEOx~nbGyfKjVoVeZ0VGPrhYBAWhK3VNYp07DCepirCTFLxChOL4DQgVL8RT30EzEefJMYnNSFaNX7NpO4HVGG3XYl-wM7oNQUOkh0Fmf4w1kyfY2o6~-IKWhIgcEJ0WVgYXzs0-XC1a8YOla0zPuLqVmkYenWkic835urSEfA624vmyM9yAVJKP3HkfJ8JFSJ4thwYPqkyFNte-HDvwQrOw__&Key-Pair-Id=K2W722D70GJS8W)
![請問這題a為何用DTFT再逆轉換算出來y[n]=0與解答用z轉換結果不同 - 2](https://d1e9oo257tadp1.cloudfront.net/uploads/qa_question_image/file/1632665/thumb_l_webp_A87EE1FE-6EA0-4218-8B20-1B9745ADCFB9.webp?Expires=1712483452&Signature=khDqph8nTJRa1WeUzESkrTkI8QEdStxzLuzL6eAAPu-DcgvfQ3ki-7vcb2Gon7184Hx5w~vronk4jQmT3lCgKT04QcRADNkLjv7NasiflA4X5Q2WxrXtOxSn9ODoJZip8Y~YbQkkPfQWNiflpkjz9tGdMp4jRjj2ELzwEZUEjpiCItnHrO5Y0gw7OlRVwPPK3BreAMtquaEShnPHG5famn7u4jnKWTFIokyr12P~imCLO-xSE5t3UsoofWkZzPz9tfhs3imufv1ZQNYxek6kgE0hSC~BZS403eusleQmfZVNDi1QxXzsokyyNRCNEn648MIkTR8ObuclhanuoaatKA__&Key-Pair-Id=K2W722D70GJS8W&Expires=1712483452&Signature=NCah3e0acjDQmq47wdN65czC6hXdQu0w3cytkx~rtS0DPVrnaPpq25P5sLNCOCj1MFLlzbt6HTqc5wRGFOI3f2oEY-qJDdJXR2GkGSurdjAEILooir48fT2kgdYl4bbzhZjuE6l0hdUTP1udeETfUYdu4dHcK4I9LQ5yJvW87ESrP47ZqjjELLTXT-MKW9W9MXBMB3zFkSGbrjXbjcAoGWPRJo6ng21C6V1gEkXTi-1HEiXjL6MN5HJRHSzAhcTbrJ4rMLo7~8i3FVMIK5Zan4xsjTDhLbXDjTA0ECrTm88udPbP7uiMuKTyTNku-yAIfaOKZvxVE7SnEYKPbN5neA__&Key-Pair-Id=K2W722D70GJS8W)
![請問這題a為何用DTFT再逆轉換算出來y[n]=0與解答用z轉換結果不同 - 3](https://d1e9oo257tadp1.cloudfront.net/uploads/qa_question_image/file/1632666/thumb_l_webp_10F4EC59-ED6C-455B-A2F3-E5B9F9F4A6BF.webp?Expires=1712483452&Signature=GcEXVcUuEqHIky~UxMZAqwVdlVz8KIaElrZUD2ni6gF~sVuFjU8yScB7Gww1EGy0FTtYDiHJwJ6ReT9w72aIVLefpUegzv84~aFLXmNyM1jfm~7Q0trDdBdM31Hu7yKMWVZA4OPZV2BSa4lrDDcouxRy0xH9Y6udp9QGO0xDsOdYHlaWKd8mtmJS03YJ3gInSyUlYDofn3G1nDms3~IXbdrLH7jUSAmCrUxBSPOIyPOvnTSeh3e4S9wTqPkEkYedUWYvTxa3T3frWKukhOzI7dvvjZFSWU5ri4z~CeBheLLehFr7rKUyN7AbCbq1QUHvz9krILg6LhaZYUcMGxWQoQ__&Key-Pair-Id=K2W722D70GJS8W&Expires=1712483452&Signature=XfpP~29L65rYRzRz6hrgqSaPrSDR~lpYiNzYRsQWyfXnBZU7jbwmpoYRxeY4AUtB61wusBJhJxggmWiCWwRzqQ-Lk1l-5P6~HQMaG7W3YZPiQe4RwIDCTAkJP8djvMJZBJEAOLcEPgoy~ber6FMpJJlphyHsPvZ6xBacELUNafLlxAKy-zk4NsXkCkLkfZBjaVSYoeoN-97a0OGJ8KUAXBcycNbseuVQntI~lKkzYBhj6fOnEwE8iPcPA0A4olkLPak5cttXuOHdinwmtBeJe6CrPKizUkeXYJbGNKjFSPKdAv8AOKN3R5xQ~wlDUZdS74Lq3a~LGbtfPLxjG-IaLg__&Key-Pair-Id=K2W722D70GJS8W)
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