2018年中考数学专题复习过关集训函数图象性质题类型一反比例函数综合题课件新人教版.ppt

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类型一 反比例函数综合题,例1 如图,点A在双曲线y (x0)上,点B在双曲线y (x0)上(点B在点A的右侧),且ABx轴若四边形OABC是菱形,且AOC60,则k_,典例精讲,例1题图,【解析】如解图,连接AC,过点A作AHOC于点H,四边形OABC是菱形,AOC60,ABOC,AOC是等边三角形,OHCH,设OHm,则AHmtan60 m ,点A的坐标为(m, m), 将点A的坐标代 入y ,得 ,解得m ,点A在第一象限,,m ,AH m ,点B的横坐标为OHAB3OH3 ,点B坐标为(3 , ),把点B坐标代入y ,得k3 6 . 【答案】6,例1题解图,

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