2017 高三月考试题剪辑(一)答案

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1、2012届高三第一次月考试题剪辑一2011.9.18BDBDC,AB-AB,CCBD-,DDB.19．28.520.21.(1)(3)(4)22.①④23.④⑤24.1125.（1）由题意知，椭圆中所以椭圆的标准方程为…………2分又顶点与焦点重合，所以；所以该双曲线的标准方程为。…………4分（2）设点在双曲线上，所以所以…………8分（3）设直线AB：由方程组得………10分设所以由弦长公式同理………12分由代入得………13分3第页所以存在使得成立。26.26题答案（3）当时,在区间上,当时,取得最大值．www.k@s@5@

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