解题方法
1 . 椭圆
的两个焦点为
,点P是椭圆上任意点(非左、右顶点),则
的周长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb4717d7fa6d522090c5e949f650bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8b45b1a7abe261651a42a7a90048dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
A.6 | B.8 | C.10 | D.12 |
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2 . 已知抛物线:
的焦点F在直线
上,抛物线与直线
交于A,B两点,
,
的延长线与抛物线交于C,D两点.
(Ⅰ)求抛物线的方程;
(Ⅱ)求证:直线
恒过一定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f662f54b1c626d48849057527cf0f08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(Ⅰ)求抛物线的方程;
(Ⅱ)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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解题方法
3 . 在平面直角坐标系
中,已知椭圆
的左、右焦点分别为
,且点
与椭圆C的上顶点构成边长为2的等边三角形.
![](https://img.xkw.com/dksih/QBM/2020/6/8/2480068559888384/2480296452120576/STEM/920490cef427499f84f0d64c8457a228.png?resizew=246)
(1)求椭圆C的方程;
(2)已知直线l与椭圆C相切于点P,且分别与直线
和直线
相交于点
.试判断
是否为定值,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](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/4d2a97987f71835f519b462f5b8f5957.png)
![](https://img.xkw.com/dksih/QBM/2020/6/8/2480068559888384/2480296452120576/STEM/920490cef427499f84f0d64c8457a228.png?resizew=246)
(1)求椭圆C的方程;
(2)已知直线l与椭圆C相切于点P,且分别与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a089c207e39a24d0d82aa853ac2bbb8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df51575d9a6b6c449c50d553c68ebb1.png)
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4 . 如图,在平面直角坐标系
中,已知椭圆
的右准线方程
,离心率
,左、右顶点分别为A,B,右焦点为F,点P在椭圆上,且位于x轴上方.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/80792c92-4f30-4ca3-a001-5287db62b4f4.png?resizew=191)
(Ⅰ)设直线
的斜率为
,直线
的斜率为
,求
的最小值;
(Ⅱ)点Q在右准线l上,且
,直线
交x负半轴于点M,若
,求点P坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495bb3e5a3a9d35f5c9f0cf1f5d51876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c7316976a221c051a2c14df80b1347.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/80792c92-4f30-4ca3-a001-5287db62b4f4.png?resizew=191)
(Ⅰ)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b0aeee86644df4cd2f02f38e0535ec.png)
(Ⅱ)点Q在右准线l上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9ca9ea5c24e205bf7e26d1f5aa49fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f6927cc2a930203ac34366383e76ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be051748e110b76402729cfcbc289cdb.png)
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名校
解题方法
5 . 已知双曲线
的一条渐近线方程为
,则此双曲线的离心率是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2766e9912b432afe598f73d5bc16a8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cc81cfaccc00aa4b7139de5a35a102.png)
A.![]() | B.![]() | C.2 | D.![]() |
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2020-06-08更新
|
350次组卷
|
6卷引用:2019年浙江省普通高中学业水平名校模拟卷(五)
名校
6 . 已知椭圆C:
的离心率
,焦距为2,直线l与椭圆C交于A,B两点.
(1)求椭圆C的标准方程;
(2)若直线l过椭圆的右焦点F,且
,求直线l方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a0a43a5b4d5b4bb4e3e936b032a80a.png)
(1)求椭圆C的标准方程;
(2)若直线l过椭圆的右焦点F,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57d366685133cf6dcd7902c40be241f9.png)
您最近一年使用:0次
2020-06-08更新
|
708次组卷
|
5卷引用:2019年浙江省普通高中学业水平名校模拟卷(一)
2019年浙江省普通高中学业水平名校模拟卷(一)(已下线)专题3-2 椭圆大题综合11种题型归类(讲+练)-【巅峰课堂】2023-2024学年高二数学热点题型归纳与培优练(人教A版2019选择性必修第一册)江苏省盐城市第一中学2020届高三下学期6月第二次调研考试数学试题陕西省渭南市大荔县2020-2021学年高三上学期10月摸底考试数学(理)试题陕西省渭南市大荔县2020-2021学年高三上学期10月摸底考试数学(文)试题
7 . 已知双曲线方程为
,则此双曲线的右焦点坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c465114dc2665d74246240b1d4d26ee.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-06-08更新
|
175次组卷
|
3卷引用:2019年浙江省普通高中学业水平冲A卷(一)
8 . 双曲线
的实轴长与焦距之和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c475c6fc03a1f556d31b87cacb5553.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
9 . 已知双曲线
的左、右焦点分别为
,直线
过左焦点
且与双曲线的左支交于
两点,且满足
,则双曲线
的离心率为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad163a58a073393c7cebc88977b2ecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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名校
10 . 已知抛物线
的焦点是
,准线是
.
(Ⅰ)写出
的坐标和
的方程;
(Ⅱ)已知点
,若过
的直线交抛物线
于不同的两点
,
(均与
不重合),直线
,
分别交
于点
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(Ⅰ)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(Ⅱ)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ac1f4eb5e6145cc1b4241065218f50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/0451f9e4f4db57e9ae978cdc27325698.png)
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