過O的直線跟矩形的交點隻能落在EDCF區間內。
是的。定義域要收縮一下:
本帖於 2024-01-06 10:26:48 時間, 由普通用戶 askerfor 編輯
過O的直線跟矩形的交點隻能落在EDCF區間內。
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