解题方法
1 . 已知双曲线
的两个焦点分别为
过点
的直线与双曲线的左右两支分别交于
两点,且
,求双曲线的离心率( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a177470398527cf88374ef97d8049658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68dd6fd36ceb4f63f88c139019c55860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7012050998032f2e03b11cf4f7f3d114.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 已知椭圆
的左右顶点分别为
,椭圆
上不同于
的任意一点
,直线
和
的斜率之积为
.
![](https://img.xkw.com/dksih/QBM/2021/2/4/2650929514004480/2652141023166464/STEM/433921c5-bd52-4b97-ae99-dd5319ffb5ad.png?resizew=260)
(1)求椭圆
的标准方程;
(2)过椭圆内一点
,作一条不垂直于
轴的直线交椭圆于
两点,点
和点
关于
轴对称,直线
交
轴于点
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/728b3360d5c6394457b907f1cbc31a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800c5e266b4ad8462a46970f0a232d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46b053f98b1d05a2043e94eeaefea87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78fd95f89dec2d373fa57f02acd739f.png)
![](https://img.xkw.com/dksih/QBM/2021/2/4/2650929514004480/2652141023166464/STEM/433921c5-bd52-4b97-ae99-dd5319ffb5ad.png?resizew=260)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过椭圆内一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a758f5f679810a247319fa8162c113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432aae51854129e8c10f7c34c0c3a79f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb74ca8fc86ddef279e33f31c1fedda.png)
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解题方法
3 . 已知动圆与直线
相交于
两点,且
.
(1)当动圆过定点
时,求动圆圆心
的轨迹方程;
(2)过点
的直线
交(1)中动圆圆心
的轨迹于
两点,点
为
的中点,过点
垂直于直线
的直线交
轴于点
,求点
的横坐标的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb6573126516181bee81e64513ec1da.png)
(1)当动圆过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a812a9b58ccba331cfd21d244329af01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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4 . 如图,已知棱长为2的正方体
中,点
是
的中点,点
分别为
的中点,
平面
平面
,平面
与平面
相交于一条线段,则该线段的长度是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/b4d57429-0c52-4d9a-bc78-78a38c6e3fbd.png?resizew=182)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1548e14a52dd7e89a8688f0ef95bfee5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4545de004381a0dfd59374e58134bd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480424a8c2252d4e5b65cf7fd33c73a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fce1ddc232738dd55ce3852b348317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7187d71b291adaaab01948ea41db954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/b4d57429-0c52-4d9a-bc78-78a38c6e3fbd.png?resizew=182)
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江西省赣州市2020-2021学年高二上学期期末考试数学(理)试题(已下线)全册综合测试模拟三 -【新教材精创】2020-2021学年高二数学新教材知识讲学(人教A版选择性必修第一册)江西省抚州市金溪县第一中学2021-2022学年高二下学期入学考试数学(理)试题
名校
解题方法
5 . 已知双曲线
右支上一点
分别为其左右焦点,圆
是
内切圆,且
与圆
相切于点
(
为半焦距),若
,则双曲线离心率的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4299de7a7907ce46991a34309768c93c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66dc110ebf129bb5e3fa6d5798870dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c89133698f2598b4c34031711258a32.png)
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6 . 设直线
与圆C:
相切于
,与抛物线
交于
两点,且
是线段
的中点,若直线
有且只有4条,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44fb58b3828f7f9a67032a7b1f052ad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
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解题方法
7 . 如图,已知三棱柱
的所有棱长均为2,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/a862be5f-7f2c-4014-ad67-e8bf652d8183.png?resizew=188)
(1)证明:
平面
;
(2)若平面
平面
为
的中点,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6eb4cbf412b69b098716b26151fba3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/a862be5f-7f2c-4014-ad67-e8bf652d8183.png?resizew=188)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89195bacd53d43195e70c12b5cfa041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2e10a5aebe40a9018d5ee3ade7af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40519d7911fd317a9961bc54ec1556ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed652434cb16c46aebffde69a0ab7d8.png)
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解题方法
8 . 如图,已知抛物线
的焦点为
,过焦点F作直线交抛物线于A,B两点,在A,B两点处的切线相交于N,再分别过A,B两点作准线的垂线,垂足分别为C,D.
![](https://img.xkw.com/dksih/QBM/2021/1/29/2646654405410816/2651384120475648/STEM/88593534-9272-4d1c-921e-0044e6634806.png)
(1)求证:点N在定直线上;
(2)是否存在点N,使得
的面积是
的面积和
的面积的等差中项,若存在,请求出点N的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d0b2c345a13a8c67a0d19c4680810bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5421a28dc3675ae20190d6090793246e.png)
![](https://img.xkw.com/dksih/QBM/2021/1/29/2646654405410816/2651384120475648/STEM/88593534-9272-4d1c-921e-0044e6634806.png)
(1)求证:点N在定直线上;
(2)是否存在点N,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9830cb9f3785e2b262b99bf831ced636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db609c0ddcb9af21ddbf443d3e527cfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7ad41b36674fd6e90176ee24cdefbb.png)
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解题方法
9 . 过平面上点
作直线
,
的平行线分别交
轴于点
,
且
.
(1)求点
的轨迹
方程;
(2)若过点
的直线
与轨迹
交于
,
两点,若
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be06299fc124d12d1ab40e25ba9a455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b9f130d7a143d493185819846f8a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9edaf1ef67f6fcad70c28c714c783443.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9380191d5128132ab5995d3f048d3539.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/592ba3eee782e564c33ec126085e4310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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10 . 已知椭圆
的左、右焦点分别为
,
为
轴上一点,
为正三角形,若
,
的中点恰好在椭圆
上,则椭圆
的离心率是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4df8816403d7f16b505ffc4a3574204d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c1dd5a3f83a7455eb3630364397accc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c287ebedc0a13723a13748b4745343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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