(49/50 + 1/50/50) * (48/49 + 1/49/49) ....*(1/2 + 1/2/2)

來源: jjmmjj 於 2009-07-09 18:57:05 [檔案] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)

回答: 回複：世界大學生奧賽題：坐飛機（2.5星）由 jjmmjj 於 2009-07-03 06:30:33

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