最小的P(X,Y)=__________.

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From: KY on 11 Dec 2009 14:23

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http://zhidao.baidu.com/question/127148478.html

x - 2*y + 3 = 0,
x + 2*y + 3 = 0,
5*x - 2*y - 9 = 0.
三角形ABC.

P(X,Y) 是三角形ABC一点分别向3边做垂直DEF分别是垂足求使
BC/PD+AC/PE+AB/PF最小的P(X,Y)=__________.

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Next: 19^19 +1^19 =19^19 (19784196556603135891233979+1=19^19)-- YOUR Mathematical PARIS IS BURNING