Sorry, there is a typo: u should be ac-bd

AiSanGuo · 2012-03-11 21:13:05Z

Sorry, there is a typo: u should be a*c-b*d简介

来源: AiSanGuo 于 2012-03-11 21:13:05 [档案] [博客] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

本帖于 2012-06-08 15:17:10 时间, 由版主 idiot94 编辑

回答: Here is another more direct proof so that you can check the prob 由 aisanguo 于 2012-03-11 19:56:30

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