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• if dy/dx=根号(1-y^2),then d^2y/dx^2=?PPBC中国植物图像库if dy/dx=根号(1-y^2),then d^2y/dx^2=?[标签：dy,dx,根号]转问给好友 ℡·MiSs宝ル 回答:0 人气:10 提问时间:2011-04-10 02:12 为避免你的答案被删除，...

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• x和y满足x·x+y·y-x+1/2y+5/16=0，求(x-2y)(x-2y)的值。要答案和解题过程，急！！！x和y满足x·x+y·y-x+1/2y+5/16=0，...有(X-1/2)^2=0 得X=1/2(Y+1/4)^2=0 得Y=-1/4 将X=1/2，Y=-1/4代入(x-2y)(x-2y)=(1/2+1/2)(1/2+1/2)...