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时间:2018-04-07
《【中考数学压轴题】十大类型之圆备考练习》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、【中考数学压轴题】十大类型之圆备考练习一、解答题(共2道,每道50分)1.如图所示,抛物线与x轴交于点A(-1,0),B(3,0)两点,与y轴交于点C(0,-3).以AB为直径作⊙M,过抛物线上一点P作⊙M的切线PD,切点为D,并与⊙M的切线AE相交于点E,连接DM并延长交⊙M于点N,连接AN,AD. (1)求抛物线所对应的函数关系式及抛物线的顶点坐标; (2)若四边形EAMD的面积为,求直线PD的函数关系式; (3)抛物线上是否存在点P,使得四边形EAMD的面积等于△DAN的面积?若存在,求出点P的坐标;若不存在,说明理由. 2.如图,在平面直角坐标系中,抛物线的
2、图象经过M(1,0)和N(3,0)两点,且与轴交于D(0,3),直线l是抛物线的对称轴. (1)求该抛物线的解析式; (2)若过点A(-1,0)的直线AB与抛物线的对称轴和x轴围成的三角形面积为6,求此直线的解析式; (3)在(2)的条件下点P在抛物线的对称轴上,⊙P与直线AB和x轴都相切,求点P的坐标. 第3页共3页内部资料,请勿外传!9JWKffwvG#tYM*Jg&6a*CZ7H$dq8KqqfHVZFedswSyXTy#&QA9wkxFyeQ^!djs#XuyUP2kNXpRWXmA&UE9aQ@Gn8xp$R#͑Gx^Gjqv^$UE9wEwZ#Q
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