-1=1的錯誤證明 (沒有 除以0 )

2026 6:51
Synopsis
我們用分部積分法來積e^x*cosh(x)而證明-1=1, 你有發現錯誤在哪嗎? 英文版: https://youtu.be/FcuGtJorHwA 問題來源Reddit ...
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