1 . 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)
您最近一年使用:0次
解题方法
2 . 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)
您最近一年使用:0次
3 . 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)
您最近一年使用:0次
名校
4 . 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
5 . 如图,设抛物线
与
的公共点
的横坐标为
,过
且与
相切的直线交
于另一点
,过
且与
相切的直线交
于另一点
,记
为
的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/6816788d-8afc-44b5-92fe-d0a99cd586d0.png?resizew=130)
(Ⅰ)求
的值(用
表示);
(Ⅱ)若
,求
的取值范围.
注:若直线与抛物线有且只有一个公共点,且与抛物线的对称轴不平行也不重合,则称该直线与抛物线相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea269be436638d38dbb599708054530a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c9c87eba774f6bc072663d32d11fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf4b43b6792b9ae78a1c8cae4e60524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17a323a522a579f2c3a70f11680aff2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/6816788d-8afc-44b5-92fe-d0a99cd586d0.png?resizew=130)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd71e7321a93815b4a5938850ce497c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
注:若直线与抛物线有且只有一个公共点,且与抛物线的对称轴不平行也不重合,则称该直线与抛物线相切.
您最近一年使用:0次
2020-01-23更新
|
954次组卷
|
2卷引用:2020年1月浙江省普通高校招生学业水平考试数学试题
2020高三·江苏·专题练习
6 . 已知椭圆E:
+
=1(a>b>0)的离心率为
,焦点到相应准线的距离为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/391632be-5af3-4ef3-a312-e146bb15b6b8.png?resizew=186)
(1) 求椭圆E的标准方程;
(2) 已知P(t,0)为椭圆E外一动点,过点P分别作直线l1和l2,直线l1和l2分别交椭圆E于点A,B和点C,D,且l1和l2的斜率分别为定值k1和k2,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7355be4fcbc3130a5951364a3be76d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5268413295580cfda0755ab458b36b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/391632be-5af3-4ef3-a312-e146bb15b6b8.png?resizew=186)
(1) 求椭圆E的标准方程;
(2) 已知P(t,0)为椭圆E外一动点,过点P分别作直线l1和l2,直线l1和l2分别交椭圆E于点A,B和点C,D,且l1和l2的斜率分别为定值k1和k2,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2efd9f1d286d417d5596e4fa2b52a4.png)
您最近一年使用:0次
2018高二上·浙江·学业考试
7 . 如图,设直线
:
与抛物线
:
相交于
,
两点,其中
点在第一象限.
![](https://img.xkw.com/dksih/QBM/2020/12/4/2606884358815744/2614927373287424/STEM/d4e05b91f0094790ad5aa940e78a134f.png?resizew=189)
(1)若点
是线段
的中点,求点
到
轴距离的最小值;
(2)当
时,过点
作
轴的垂线交抛物线
于点
,若
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c28904157d44a093847073a4c57f4f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/2020/12/4/2606884358815744/2614927373287424/STEM/d4e05b91f0094790ad5aa940e78a134f.png?resizew=189)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6ee2cb7e0ddc9cdfcaec0ae903ed78e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
解题方法
8 . 如图,已知抛物线
的焦点为
,
为坐标原点,直线
与抛物线
相交于
,
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/90454f7c-9f4b-4b20-961e-97b23c25ba88.png?resizew=130)
(1)当
,
时,求证:
;
(2)若
,点
关于直线
的对称点为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa2c731aaa4005382d5b4324e29fbb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f24e616b5a35ff372c78c1472f156ab.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://img.xkw.com/dksih/QBM/editorImg/2022/11/5/90454f7c-9f4b-4b20-961e-97b23c25ba88.png?resizew=130)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f06408895febc126c2ae409e807349c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f20bf927d76ca5c9679922cc89f489.png)
您最近一年使用:0次
9 . 如图,在平面直角坐标系xOy中,已知椭圆C:
(a>b>0)的离心率为
,且右焦点到右准线l的距离为1.过x轴上一点M(m,0)(m为常数,且m∈(0,2))的直线与椭圆C交于A,B两点,与l交于点P,D是弦AB的中点,直线OD与l交于点Q.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/91666770-8cc4-4349-846d-9fc78499a400.png?resizew=168)
(1) 求椭圆C的标准方程.
(2) 试判断以PQ为直径的圆是否经过定点.若是,求出定点坐标;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/91666770-8cc4-4349-846d-9fc78499a400.png?resizew=168)
(1) 求椭圆C的标准方程.
(2) 试判断以PQ为直径的圆是否经过定点.若是,求出定点坐标;若不是,请说明理由.
您最近一年使用:0次
2020-01-18更新
|
553次组卷
|
7卷引用:2019年浙江省普通高中学业水平名校模拟卷(五)
2019年浙江省普通高中学业水平名校模拟卷(五)【市级联考】江苏省徐州市(苏北三市(徐州、淮安、连云港))2019届高三年级第一次质量检测数学试题(已下线)专题12 圆锥曲线的综合应用-《巅峰冲刺2020年高考之二轮专项提升》(江苏)(已下线)数学-6月大数据精选模拟卷03(山东卷)(满分冲刺篇)(已下线)数学-6月大数据精选模拟卷02(北京卷)(满分冲刺篇)(已下线)数学-6月大数据精选模拟卷02(海南卷)(满分冲刺篇)(已下线)考点27 椭圆的综合问题-2021年高考数学三年真题与两年模拟考点分类解读(新高考地区专用)
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)
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