已知椭圆E:
,点P(2,t),F为椭圆的左焦点,过点P作椭圆的切线PA、PB,切点分别为A、B,则
ABF面积的范围是__________ .(经过椭圆
上一点(x0,y0)的椭圆的切线方程是:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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2019·安徽·一模 查看更多[3]
安徽省淮北市、宿州市2018-2019学年高三上学期一模数学(文)试题(已下线)考点49 直线与圆锥曲线的位置关系-备战2021年高考数学经典小题考前必刷(新高考地区专用)(已下线)2022年高考考前20天终极冲刺攻略(三)【理科数学】(5月29日)
更新时间:2020-10-24 22:42:28
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【推荐1】椭圆
上的点到直线
的最大距离是_______
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【推荐2】已知椭圆
,椭圆的左右焦点分别为
,点
为椭圆上一点且
,过A作椭圆E的切线l,并分别交
于C、D点.连接
,
与
交于点E,并连接
.若直线l,
的斜率之和为
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【推荐1】已知以
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,点
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的面积最大值为
,则
的最大值为________ .
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【推荐2】已知椭圆的标准方程为
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,左顶点为
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【推荐1】设椭圆
的上顶点为
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于
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【推荐2】已知椭圆
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