Great, but we should plus "至多",兩直線隻能相交至多一點.

jinjing · 2011-12-25 19:08:05Z

Great, but we should plus "至多",兩直線隻能相交至多一點.簡介

來源: jinjing 於 2011-12-25 19:08:05 [檔案] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)

回答: 邏輯上，正命題與逆否命題同對同錯。用反證法證之。由皆兄弟也於 2011-12-25 15:35:02

您的位置：文學城 » 論壇 » 腦筋急轉 » Great, but we should plus "至多",兩直線隻能相交至多一點.

• xie！nothing Great, just a little issue. -皆兄弟也- ♂ (0 bytes) () 12/25/2011 postreply 20:30:07

• more accurate with plussing "至多" -皆兄弟也- ♂ (0 bytes) () 12/25/2011 postreply 20:34:54