名校
1 . 已知椭圆
与x轴负半轴交于
,离心率
.
(1)求椭圆C的方程;
(2)设直线
与椭圆C交于
两点,连接AM,AN并延长交直线x=4于
两点,若
,直线MN是否恒过定点,如果是,请求出定点坐标,如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c7316976a221c051a2c14df80b1347.png)
(1)求椭圆C的方程;
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7d5b7a335fb30a034976287aee9e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de609fe5eec3acd8bb727e76b3774679.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d9c396aa08378615623bc019d6a2831.png)
您最近一年使用:0次
2020-01-01更新
|
910次组卷
|
6卷引用:江苏省扬州市广陵区扬州中学2019-2020学年高二上学期12月月考数学试题
2 . 已知三棱锥
(如图1)的平面展开图(如图2)中,四边形
为边长等于
的正方形,
和
均为正三角形,在三棱锥
中:
平面
;
(2)若点
在棱
上运动,当直线
与平面
所成的角最大时,求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a00d05c60999eff91345a545fb57e9af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98553247801c03de24cf7e687016e655.png)
您最近一年使用:0次
2019-12-27更新
|
773次组卷
|
3卷引用:江苏省南通市如皋中学2019~2020学年高一上学期阶段考试数学试题(创新班)
3 . 在平面直角坐标系xOy中,已知椭圆
1(a>b>0)的右顶点为(2,0),离心率为
,P是直线x=4上任一点,过点M(1,0)且与PM垂直的直线交椭圆于A,B两点.
(1)求椭圆的方程;
(2)若P点的坐标为(4,3),求弦AB的长度;
(3)设直线PA,PM,PB的斜率分别为k1,k2,k3,问:是否存在常数λ,使得k1+k3=λk2?若存在,求出λ的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22ecb9b0a87ab5098571bdf80441231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9c6fe12d3a9727e00ef87a630302ab.png)
(1)求椭圆的方程;
(2)若P点的坐标为(4,3),求弦AB的长度;
(3)设直线PA,PM,PB的斜率分别为k1,k2,k3,问:是否存在常数λ,使得k1+k3=λk2?若存在,求出λ的值;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/eb1974fb-db6a-48a0-afa4-a1daf1e0d139.png?resizew=235)
您最近一年使用:0次
名校
4 . 已知椭圆
的焦距为
分别为椭圆
的左、右顶点,
为椭圆
上的两点(异于
),连结
,且
斜率是
斜率的
倍.
(1)求椭圆
的方程;
(2)证明:直线
恒过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4cc7e0652c566671737795b156a8e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4689e7492d26d4f77a0c74d4444550.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24addb24d1ec87d57c26897123f7df39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2019-12-12更新
|
1993次组卷
|
3卷引用:江苏省泰州中学2019-2020学年高二上学期期中考试数学试题
江苏省泰州中学2019-2020学年高二上学期期中考试数学试题江苏省南通巿2019-2020学年高二上学期第一次教学质量调研数学试题(已下线)专题7 圆锥曲线之极点与极线 微点3 圆锥曲线之极点与极线综合训练
5 . 如图,在平面直角坐标系xOy中,
,
分别是椭圆
的左,右焦点,点P是椭圆E上一点,满足
轴,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/f0206cfe-8d3a-45d1-8af0-f4f0efcc7a45.png?resizew=223)
(1)求椭圆E的离心率;
(2)过点
的直线l与椭圆E交于两点A,B,若在椭圆B上存在点Q,使得四边形OAQB为平行四边形,求直线l的斜率.
![](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/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa9a6be97b5f275d55697fd3cd0a442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b6e8466c7299fbe94687ba5916a7be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/f0206cfe-8d3a-45d1-8af0-f4f0efcc7a45.png?resizew=223)
(1)求椭圆E的离心率;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96d115c78edb2cc5a9446c1e8f1ec3ad.png)
您最近一年使用:0次
6 . 如图,已知椭圆
的左、右焦点分别为
、
,以线段
为直径的圆与椭圆交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/f2b8f33c-c78d-4d21-a40e-6acb3f53dd34.png?resizew=211)
(1)求椭圆的方程;
(2)过
轴正半轴上一点
作斜率为
的直线
.
①若
与圆和椭圆都相切,求实数
的值;
②直线
在
轴左侧交圆于
、
两点,与椭圆交于点
、
(从上到下依次为
、
、
、
),且
,求实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.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/643ef7d761de0e794fc39937dc72ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bb24fde672f136aa564b067e7ac3229.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/f2b8f33c-c78d-4d21-a40e-6acb3f53dd34.png?resizew=211)
(1)求椭圆的方程;
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17dda982b031f09ebe66ef4d1507b0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893d4e8d70ea2c716ac7b6c1777a77f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a510a3eb906b3ef0760b0d1723d11ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
19-20高二上·江苏·阶段练习
名校
7 . 已知椭圆
经过点
,
是
的一个焦点,过
点的动直线
交椭圆于
两点.
(1)求椭圆
的方程;
(2)是否存在定点
(异于点
),对任意的动直线
(斜率存在)都有
,若存在求出点
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925b1e900666c0f0bae16a83a274d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07bbc46415ec136f5ea9a15f4678bc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5421a28dc3675ae20190d6090793246e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/01c74a907dda6bb7d9d56d009d9df253.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)是否存在定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/6b8bb6b44dc190180e1b4aa4df4bc5af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2019-11-06更新
|
1021次组卷
|
3卷引用:江苏省如皋市2019-2020学年度高二年级上学期教学质量调研(一)数学试题
(已下线)江苏省如皋市2019-2020学年度高二年级上学期教学质量调研(一)数学试题湖南省长沙市雨花区2019-2020学年高二上学期期末数学试题湖南省长沙市雅礼中学2019-2020学年高二上学期期末数学试题
名校
8 . 已知抛物线
的焦点为
,点
在抛物线
上,
,且
.
(1)求抛物线
的标准方程;
(2)过点
作直线
,
分别交抛物线
于
,
两点,若直线
,
的倾斜角互补,求直线
的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4758fcb2f4a4a0011ab0ad7e3ba013e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088f178d36f9c33002e869e6a4ebb489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b27d227ae0542e632a26a7d55e56f0.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dbcf0320d94734aedd3d4e2e31b9827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2019-10-14更新
|
1062次组卷
|
2卷引用:江苏省南通市海安市海安高级中学2019-2020学年高二上学期期中数学试题
解题方法
9 . 已知椭圆C:
(a>b>0),左、右焦点分别为F1(﹣1,0),F2(1,0),椭圆离心率为
,过点P(4,0)的直线l与椭圆C相交于A、B两点(A在B的左侧).
(1)求椭圆C的方程;
(2)若B是AP的中点,求直线l的方程;
(3)若B点关于x轴的对称点是E,证明:直线AE与x轴相交于定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆C的方程;
(2)若B是AP的中点,求直线l的方程;
(3)若B点关于x轴的对称点是E,证明:直线AE与x轴相交于定点.
您最近一年使用:0次
10 . 如图,在三棱锥
中,
,
为
的中点,
平面
,垂足
落在线段
上,
为
的重心,已知
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/9989fe13-805f-4c16-81c3-a6eb5dfd3b39.png?resizew=179)
(1)证明:
平面
;
(2)求异面直线
与
所成角的余弦值;
(3)设点
在线段
上,使得
,试确定
的值,使得二面角
为直二面角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deae57d07054a06b33749895b1540b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e9f0780ca00e9ae5828038d25b9661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b013d2a534c22cbcae05549fe54e0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70834818750d0454474ac7c357cd287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01cd2bf7c88e24c91625e0f20ba2a4bb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/9989fe13-805f-4c16-81c3-a6eb5dfd3b39.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a04ea8ebc597fd1f5d6bb8df181a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36957cc47e8b85809737f005345fd619.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
(3)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4fce8e923062b9779553d6f282895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c83efc25ec407b5fddf95ba33691e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f45c7733405e33ab597a2116ae363cf.png)
您最近一年使用:0次