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you yi dao zhong kao shi ti yin chu de ji ge you mei xing zhi ji qi ying yong
Author(s): 
Pages: 60-62
Year: Issue:  4
Journal: ZHONGXUE SHUXUE ZAZHI(CHUZHONG BAN)

Abstract: 1试题及解答
  如图1,反比例函数y= kx ( x >0)的图像经过矩形OABC对角线的交点M,分别与AB、BC交于点D、E,若四边形ODBE的面积为9,则k的值为(). A.1 B.2 C.3 D.4分析本题可从反比例函数图像上的点E、M、D入手,分别找出△OCE、△OAD、矩形OABC的面积与比例系数k的关系,列出关于k的方程,从而通过解方程求出k值.解略。

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