[理工][離散] 99中山資工
Determine the number of integer solution
X1+X2+X3+X4+X5=16 Xi>0 i=1,2,3,4,5
這題書上的答案是C16取12
可是我算出來的答案是C15取4
請問我有算錯嗎?
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 220.143.24.140
→
02/04 13:06, , 1F
02/04 13:06, 1F
推
02/04 13:47, , 2F
02/04 13:47, 2F
推
02/04 15:40, , 3F
02/04 15:40, 3F
→
02/04 15:52, , 4F
02/04 15:52, 4F
→
02/04 21:40, , 5F
02/04 21:40, 5F
→
02/05 00:23, , 6F
02/05 00:23, 6F
推
12/21 22:46, , 7F
12/21 22:46, 7F