2024高二·江苏·专题练习
解题方法
1 . 已知,
为双曲线
的两个焦点,
为双曲线
上一点,且
,
,则双曲线
的离心率可以为( )
A.![]() | B.![]() | C.2 | D.![]() |
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2 . 如图,在
中,已知
,其内切圆与AC边相切于点D,且
,延长BA到E,使
,连接CE,设以E,C为焦点且经过点A的椭圆的离心率为
,以E,C为焦点且经过点A的双曲线的离心率为
,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1ac3ab8d3ce5e61fd2f89761f80976.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/6b2c013c4deb2aa5746bb8389b34e2be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/76d70898-eda3-4a25-b6d0-a84ea8488704.png?resizew=128)
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解题方法
3 . 已知双曲线
(
,
)的右焦点为F,过点F且斜率为k(
)的直线l交双曲线于A、B两点,线段AB的中垂线交x轴于点D.若
,则双曲线的离心率的值可能是( )
![](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/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05a3393cde3cc2544426149130e2af4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 已知
分别是双曲线
的上、下焦点,经过点
且与
轴垂直的直线与
的一条渐近线相交于点
,且
在第四象限,四边形
为平行四边形,若
的离心率的取值范围是
,则直线
的倾斜角
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5651ad312b44662f444de95a6318826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bb9c075a320b0fe23145061b1fb0f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb17df4e4b2a9f6ed1d3f62ddac97b96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16c755ab3fea6ca99b13193a5d7e485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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解题方法
5 . 设双曲线
的右焦点为F,
,
为坐标原点,过
的直线
与
的右支相交于A,B两点.
(1)若
,求
的离心率
的取值范围;
(2)若
恒为锐角,求
的实轴长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04959523a28786962d51cfb43a8767d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03a8011c4a02259e0fbc77a21bba817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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6 . 直线l与双曲线
的左,右两支分别交于点A,B,与双曲线的两条渐近线分别交于点C,D(A,C,D,B从左到右依次排列),若
,且
,
,
成等差数列,则双曲线的离心率的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ec7fa23be9cbe9a50607ea6bc8a4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3342232b5d2e6a947cbadbae64b01f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24b94392a78a2325a4834c2018a8e2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76a252b78a4313d37b859a5b3ebfd08.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
7 . 已知双曲线
右焦点为
,过
且垂直于x轴的直线与双曲线交于A,B两点,点
,若
为锐角三角形,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2855d0a2c217c344a0823bfc8f954d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5a992f0cae01d21115c4b025688e0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
A.双曲线过点![]() |
B.直线![]() |
C.双曲线的一条渐近线![]() ![]() |
D.双曲线的离心率取值范围为![]() |
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