[理工] 104 台大資工 數學
第五題QQ
http://imgur.com/kQYWDMK
如附圖,這排列組合毫無頭緒QQ
希望有高手相助><
謝謝了。
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→
02/13 21:26, , 1F
02/13 21:26, 1F
→
02/13 22:02, , 2F
02/13 22:02, 2F
謝謝各位><
※ 編輯: skypole (140.112.25.105), 02/13/2016 22:25:35
推
02/13 22:31, , 3F
02/13 22:31, 3F
→
02/13 22:32, , 4F
02/13 22:32, 4F
→
02/13 22:32, , 5F
02/13 22:32, 5F
→
02/13 22:34, , 6F
02/13 22:34, 6F
這裏應該是到x^[r-n(n+1)/2]吧
因為可能最後一個把剩下的都拿走
→
02/13 22:35, , 7F
02/13 22:35, 7F
感謝樓上,看完wiki後了解惹><
※ 編輯: skypole (140.112.25.105), 02/13/2016 22:47:21
※ 編輯: skypole (140.112.25.105), 02/13/2016 22:51:30
推
02/13 23:24, , 8F
02/13 23:24, 8F
→
02/13 23:25, , 9F
02/13 23:25, 9F
→
02/13 23:28, , 10F
02/13 23:28, 10F
→
02/13 23:30, , 11F
02/13 23:30, 11F
→
02/13 23:31, , 12F
02/13 23:31, 12F
推
02/13 23:34, , 13F
02/13 23:34, 13F
→
02/13 23:35, , 14F
02/13 23:35, 14F
推
02/13 23:36, , 15F
02/13 23:36, 15F
推
01/21 12:41, , 16F
01/21 12:41, 16F
推
01/21 12:41, , 17F
01/21 12:41, 17F
推
01/21 12:41, , 18F
01/21 12:41, 18F
推
01/21 12:42, , 19F
01/21 12:42, 19F
推
01/21 12:48, , 20F
01/21 12:48, 20F