_________________ If I were assured of the former eventuality I would, in the interests of the public, cheerfully accept the latter.
2005-08-29 11:52
artemis Just popping in
註冊日: 2005-08-21 發表數: 3
Re: 請問這一題....謝謝
There shoud be an infinite amount of answers, for it is not stated clearly whether we could strech in any paticular direction.
2005-09-03 22:31
訪客
Re: 請問這一題....謝謝
無限多種
2005-09-04 11:23
訪客
Re: 請問這一題....謝謝
題目應該修正成 只有以方向"↑""↓"前進且不經過原點的走法有幾種?
如果有↑"又有"↓" 這樣不停來回就可以組合出無限次了
2005-10-12 12:13
訪客
Re: 請問這一題....謝謝
對不起 應該說 以方向"↑""→"前進且不經過原點的走法有幾種?
不能有"↑"也有"↓" 這樣來回可以隨意n次 n=1, 2, 3 .... 每次的路徑當然不同
2005-10-12 12:15
訪客
Re: 請問這一題....謝謝
題目修正後答案為
C10取4 - C3取1 x C7取三 = 210 - 105 = 105種
2005-10-12 12:20
九章數學出版社、九章數學基金會版權所有 本網頁各鍊結標題及鍊結內容歸原權利人所有 Copyright 2000 ~2004九章數學出版社、九章數學基金會 本網站內所有文字及資料版權均屬九章所有，未經書面同意之商業用途必究 This web site was made with XOOPS, a web portal system written in PHP. XOOPS is a free software released under the GNU/GPL license.
