已知双曲线
,
的左、右焦点分别为
、
,且
的焦点到渐近线的距离为1,直线
与
交于
,
两点,
为弦
的中点,若
为坐标原点)的斜率为
,
,则下列结论正确的是____________
①
; ②
的离心率为
; ③若
,则
的面积为2;
④若
的面积为
,则
为钝角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f401b56058f8325f84b3ca97a28314da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f189e547fb8da25773c7d09f84445bd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a350d44bf2b7ddfbfe23c754efa9c8d4.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31f8f7e40ba386c0a9675896b52752d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2427943a38dcd93c9ec9b735ffc9fe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
21-22高二上·广西南宁·期末 查看更多[3]
广西南宁市普通高中联盟2021-2022学年高二上学期期末联考数学(文)试题广西南宁市普通高中联盟2021-2022学年高二上学期期末联考数学(理)试题(已下线)3.3(附加1)圆锥曲线的弦长与中点弦问题-2022-2023学年高二数学《基础·重点·难点 》全面题型高分突破(苏教版2019选择性必修第一册)
更新时间:2022-03-30 15:13:24
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解题方法
【推荐1】点
是双曲线
上的一个动点,点
到双曲线
的两条渐近线的距离分别为
,若
,则双曲线
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【推荐2】已知双曲线
的左、右焦点分别为
,过
的直线与
的右支交于
两点,若
,且
,则
的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
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【推荐1】已知双曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f355606014da36fc9b6543ab9f4cd22.png)
的左、右焦点分别为
、
,P圆
上且不在
轴上的任一点,
的面积为
,则双曲线的离心率的最大值为______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e60b2c76ff64741e9cddccd7a614fb2.png)
______ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f311053d11884b1a21d5f9b5724996c6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4dd180cad174c40b84b7659dd8e45e4.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbfa684a590d9e2440a6b438eb79ecc.png)
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【推荐2】已知F1,F2分别为双曲线C:
的上、下焦点,过点F2作y轴的垂线交双曲线C于P,Q两点,则△PF1Q的面积为________ .
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【推荐1】双曲线
:
被斜率为
的直线截得的弦
的中点为
则双曲线
的离心率为 ______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e61f79899714c8b8b98f32e08de62.png)
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【推荐2】给出问题:已知双曲线方程为
,问以定点
为中点的弦存在吗?若存在,求出其所在直线的方程;若不存在,请说明理由.
某学生的解答如下:过点
与
轴垂直的直线与双曲线只有唯一的公共点
,显然不符题意,所以可设所求直线的斜率为
,则直线方程为
,即
,将它代入得
,
,设直线与双曲线相交于
,则
,若
为线段
的中点,则
,即
,解得
.所以满足条件的直线存在,方程为
.
该学生的解答是否正确?并说明理由_______________________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d3bfa155ad67018da4d65815c5e5b8.png)
某学生的解答如下:过点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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该学生的解答是否正确?并说明理由
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