1 . 已知双曲线C:
的左、右焦点分别为
,
,点P是C的右支上的一点,C在点P处的切线与C的渐近线交于M,N两点,O为坐标原点,给出下列四个结论:
①直线
的斜率的取值范围是
;
②点P到C的两条渐近线的距离之积为
;
③
;
④
.
其中所有正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bf5b6dc0c77f6415940756380933f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da01a3abe1c9dc4e6283afa0dc1a0d39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b1af5d4b930f8989cf63d44768621e.png)
②点P到C的两条渐近线的距离之积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841245ab5c8ffe0af2d54b7dfa23f46f.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3384392c0eaabe04ae2aea7a3f2649.png)
其中所有正确结论的个数是( )
A.1 | B.2 | C.3 | D.4 |
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2 . 已知双曲线
的右焦点为
,双曲线
的上焦点为
,直线
,且
既是
的渐近线也是
的渐近线.
(1)求
的方程;
(2)过
作与
轴不垂直的直线与
的右支交于点
,若点
在
轴上,且
,求证:
为定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2cfa22139b3e9c9a73500e1ba19f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0e663a87837e5d4b78d29f34ad4cd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d66e4d1bf5c896b705a60cfc5dc347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46a9cc811fcdb53b2534fbd518e6437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe1a148fa85d8c86c2bd3e2b60995892.png)
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解题方法
3 . 直线
与双曲线
有且只有一个交点,那么实数k的值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ebce8b2a915356ed39f36c5bad2ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5848e50805496263d52dcbde9671a89.png)
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解题方法
4 . 已知
是双曲线
的左右焦点,过
的直线
交双曲线右支于
两点,
分别是
和
的内切圆半径,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7638c88f01d609d79947033ed4ff36a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c477e5ade921ffa8377c4719319380ff.png)
![](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/20ebaa32f4f1f4f807ca9aeb7fb29951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7782fa5e5c4da7820d21291058df556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2cfd997d3b66a3b8f7731b26f0ab0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47444b5fbc4252516d54263062e47c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de4e638087c0ada4d1a5cbfbcecb752.png)
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解题方法
5 . 已知双曲线E
的右焦点为F,以F为圆心,
为半径的圆与双曲线 E的一条渐近线交于A,B两点,若
,则双曲线 E的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbaf1f37bbe245f3618bef9fabb75ace.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41515fea3b3d3afa77c8f1ca1a3cb7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0224ca3e51c0da0960576918535981ab.png)
A.![]() | B.![]() | C.![]() | D.3 |
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解题方法
6 . 已知双曲线
:
(
,
)经过点
,且其离心率为
.
(1)求双曲线
的方程;
(2)设双曲线
的左,右焦点分别为
,
,
的一条渐近线上有一点
,满足
恰好垂直于这条渐近线,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a950a998c992f4cdf141bd6893261fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设双曲线
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
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7 . 已知双曲线
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6a3a75f8157812f6ba7b71c1b02a57.png)
A.![]() ![]() |
B.![]() ![]() ![]() |
C.![]() ![]() |
D.![]() |
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8 . 双曲线
的一个顶点到渐近线的距离为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2724acdc1cbf15077b0b0295ab21a3d.png)
A.![]() | B.4 | C.![]() | D.![]() |
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名校
9 . 已知曲线
的方程为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111f9cf872c632ab45fae4c4dcd360ea.png)
A.当![]() ![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() |
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10 . 已知抛物线
的焦点与双曲线
的一个焦点重合,则该双曲线的渐近线方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290a56449ad6dd65aec7525c94273f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dce272234b88a3eb0087877b073371.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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