已知双曲线
上一点到双曲线左、右焦点的距离之差为4,若抛物线
上的两点
关于直线
对称,且
,则实数m的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ec7fa23be9cbe9a50607ea6bc8a4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf210c8c9e83e70f2d3ede1e18a5f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9979824cde49098a08b096d203ced9c1.png)
2019·河北石家庄·模拟预测 查看更多[4]
2019届河北省石家庄市第一中学高三下学期冲刺模拟(七)数学(文)试题(已下线)单元卷 圆锥曲线与方程(提高卷)-2020-2021学年高二数学课时同步练(苏教版选修1-1)(已下线)第2章 圆锥曲线与方程(提高卷)-2020-2021学年高二数学课时同步练(苏教版选修2-1)江苏省扬州中学2021-2022学年高二下学期开学检测数学试题
更新时间:2020-03-21 16:16:56
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解题方法
【推荐1】已知
是椭圆和双曲线的公共焦点,
是它们的一个公共点,且
,椭圆的离心率为
,双曲线的离心率
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23cecb879eac526ad4e95ad33f1249fd.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db634c178cd7bffbd4cb886e3f2cca22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33558881906c228c262ff8024dcfc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33a99190a8fd29c36d5a002e3197cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23cecb879eac526ad4e95ad33f1249fd.png)
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【推荐2】已知
是圆
上一动点,
为圆
所在平面内一定点(
为圆
的圆心),线段
的垂直平分线与直线
交于点
,则点
的轨迹可能是________ .(写出所有正确结论的序号)①圆;②椭圆;③双曲线;④抛物线;⑤一个点;⑥直线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4b1d07f844b1e9e7194d0ceea7b587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】抛物线有一条重要性质:从焦点出发的光线,经过抛物线上的一点反射后,反射光线平行于抛物线的轴.过抛物线
:
上的点
(不为原点)作
的切线
,过坐标原点
作
,垂足为
,直线
(
为抛物线的焦点)与直线
交于点
,点
,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1afc3379d1ca85613337cf7ea35e277b.png)
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【推荐2】下列四个结论中正确的个数是__________ .
(1)
为
的导函数,若
,则
为函数
的极值点;
(2)过函数
图象上任一点只能作出一条切线;
(3)等轴双曲线的离心率都是
;
(4)已知抛物线
,过定点
的直线与抛物线C交于A、B两点,O为坐标原点,则
为定值.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57aae213fa87eb9e57cc689fe20bb4fc.png)
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(2)过函数
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(3)等轴双曲线的离心率都是
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(4)已知抛物线
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