If you are intresting,let me know...I have do something right now.
I can verify it by Analitical Geo.Easy but boring.
所有跟帖:
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我个人认为用解析几何来做将会极其困难(如果不是无解的话)...
-与数学无关-
♂
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09/15/2010 postreply
20:23:34