已知双曲线C1与椭圆
=1有相同的焦点,并且经过点
.
(1)求C1的标准方程;
(2)直线l:y=kx-1与C1的左支有两个相异的公共点,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d9fb4b3f8d925922d0853d1c94db86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf5b06ef689b4e41db5e9578e061ef7.png)
(1)求C1的标准方程;
(2)直线l:y=kx-1与C1的左支有两个相异的公共点,求k的取值范围.
2020高三·全国·专题练习 查看更多[1]
(已下线)专题9.9 圆锥曲线的综合问题(练)【理】-《2020年高考一轮复习讲练测》
更新时间:2020-01-21 14:06:17
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解答题-问答题
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解题方法
【推荐1】已知点
是双曲线
的左、右焦点,
是
右支上一点,
的周长为
,
为
的内心,且满足
.
(1)求双曲线
的标准方程;
(2)过
的直线
与双曲线的右支交于
两点,与
轴交于点
,满足
(其中
),求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2cfa22139b3e9c9a73500e1ba19f52.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/91fbc9b62f2e82af009bd2f4587969fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b837fd9c52f60bfb3b6852733abc790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fbc9b62f2e82af009bd2f4587969fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe220ed599304228b3a3bfd084aec23.png)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b31592cf8ee3d303f00d7f1619a8909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de3404af80900bdb117c8eb9c2fdddc.png)
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【推荐2】已知点
为双曲线
:
的左、右焦点,过
作垂直于
轴的直线,在
轴上方交双曲线C于点
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9379edcc0fad1632ca2fd9fd239f08.png)
(1)求双曲线C的方程;
(2)若直线
与双曲线C恒有两个不同交点P和Q且
(其中O为原点),求k的取值范围;
(3)过双曲线C上任意一点R作该双曲线两条渐近线的垂线,垂足分别为M,N,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef418612694bad6623eed90cafc9d23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9ebed0fde139e9699a8c46cc6620ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9379edcc0fad1632ca2fd9fd239f08.png)
(1)求双曲线C的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0040d5a1c4cdff062e5782d5e484795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cabe7e6f26ef824d05411a88d7f738c.png)
(3)过双曲线C上任意一点R作该双曲线两条渐近线的垂线,垂足分别为M,N,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c57463a8e6295f54a90d41d9f871b6.png)
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【推荐1】已知双曲线C的中心为坐标原点,左焦点为
,离心率为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/c40da5f2-1ed7-48ed-a8a9-6307c332b0ec.png?resizew=197)
(1)求C的方程;
(2)记C的右顶点为A,过点A作直线MA,NA与C的左支交于M,N两点,且
,
,D为垂足.证明:存在定点Q,使得
为定值,并求出Q点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e47e3ecdff18bdbe66c366f19aeac1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/c40da5f2-1ed7-48ed-a8a9-6307c332b0ec.png?resizew=197)
(1)求C的方程;
(2)记C的右顶点为A,过点A作直线MA,NA与C的左支交于M,N两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3342ceb71dc21a5e6150caad2ce0b029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7920d2550a6af7df3db60a33fe02c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6c1e83db94aee2d609d5736d985eac.png)
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【推荐2】如图所示的“8”字形曲线是由两个关于x轴对称的半圆和一个双曲线的一部分组成的图形,其中上半个圆所在圆方程是x2+y2﹣4y﹣4=0,双曲线的左、右顶点A、B是该圆与x轴的交点,双曲线与半圆相交于与x轴平行的直径的两端点.
(1)试求双曲线的标准方程;
(2)记双曲线的左、右焦点为F1、F2,试在“8”字形曲线上求点P,使得∠F1PF2是直角.
(3)过点A作直线l分别交“8”字形曲线中上、下两个半圆于点M、N,求|MN|的最大长度.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/f3873ea7-f346-44fe-ba91-b4a43c768e79.png?resizew=139)
(1)试求双曲线的标准方程;
(2)记双曲线的左、右焦点为F1、F2,试在“8”字形曲线上求点P,使得∠F1PF2是直角.
(3)过点A作直线l分别交“8”字形曲线中上、下两个半圆于点M、N,求|MN|的最大长度.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/f3873ea7-f346-44fe-ba91-b4a43c768e79.png?resizew=139)
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