1 . 已知抛物线
,点F为C的焦点,过F的直线l交C于A,B两点.
(1)设A,B在C的准线上的射影分别为P,Q,线段PQ的中点为R,证明:
;
(2)在x轴上是否存在一点T,使得直线AT,BT的斜率之和为定值?若存在,求出点T的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
(1)设A,B在C的准线上的射影分别为P,Q,线段PQ的中点为R,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dfef6d377bcdddcfdd1f206571ed005.png)
(2)在x轴上是否存在一点T,使得直线AT,BT的斜率之和为定值?若存在,求出点T的坐标;若不存在,请说明理由.
您最近一年使用:0次
2022-01-15更新
|
830次组卷
|
2卷引用:河北省深州市中学2022届高三上学期期末数学试题
2 . 如图所示,在四棱锥
中,
平面
,底面ABCD满足AD∥BC,
,
,E为AD的中点,AC与BE的交点为O.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/32985d4d-445f-41d1-83a9-6bc6e625cd24.png?resizew=153)
(1)设H是线段BE上的动点,证明:三棱锥
的体积是定值;
(2)求四棱锥
的体积;
(3)求直线BC与平面PBD所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a992115be2c1874282898fea4417ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/32985d4d-445f-41d1-83a9-6bc6e625cd24.png?resizew=153)
(1)设H是线段BE上的动点,证明:三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63360ee144c8caaed4aea74e2058cc12.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(3)求直线BC与平面PBD所成角的余弦值.
您最近一年使用:0次
2022-07-16更新
|
930次组卷
|
2卷引用:陕西省西安市长安区第一中学2021-2022学年高一下学期期末数学试题
名校
解题方法
3 . 已知双曲线C的渐近线方程为
,且过点
.
(1)求C的方程;
(2)设
,直线
不经过P点且与C相交于A,B两点,若直线
与C交于另一点D,求证:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b75308335340230171130238f4dc6c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb54965a17179fa91596483e765d24a.png)
(1)求C的方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdebfa07f9b53d79d119cd3a1048e78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2647731e570e4ff921df76c99b18cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
2022-01-11更新
|
1644次组卷
|
5卷引用:广东省佛山市普通高中2022届高三上学期期末数学试题
广东省佛山市普通高中2022届高三上学期期末数学试题(已下线)专题13解析几何中的定值、定点和定线问题(练)--第一篇 热点、难点突破篇-《2022年高考数学二轮复习讲练测(新高考·全国卷)》(已下线)二轮拔高卷03-【赢在高考·黄金20卷】备战2022年高考数学模拟卷(新高考专用)江苏省南通市海安市实验中学2023-2024学年高三上学期10月月考数学试题四川省泸州市泸县第四中学2023-2024学年高二上学期12月月考数学试题
解题方法
4 . 三等分角是古希腊三大几何难题之一,公元3世纪末,古希腊数学家帕普斯利用双曲线解决了三等分角问题,如图,已知直线l:x=1与x轴交于点C,以C为圆心作圆交x轴于A,F两点,在直径AF上取一点B,满足
,以A,B为顶点,F为焦点作双曲线D:
,与圆在第一象限交于点E,则E为圆弧AF的三等分点,即CE为∠ACF的三等分线.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923353763495936/2932053933514752/STEM/d429cb29-e09d-472c-a8b3-6093c42d4a5c.png?resizew=166)
(1)求双曲线D的标准方程,并证明直线CE与双曲线D只有一个公共点.
(2)过F的直线与双曲线D交于P,Q两点,过Q作l的垂线,垂足为R,试判断直线RP是否过定点.若是,求出定点坐标;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03932b41fe531663dfb387565edbde0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb74c0c2d1e5305cf55cfb9605929268.png)
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923353763495936/2932053933514752/STEM/d429cb29-e09d-472c-a8b3-6093c42d4a5c.png?resizew=166)
(1)求双曲线D的标准方程,并证明直线CE与双曲线D只有一个公共点.
(2)过F的直线与双曲线D交于P,Q两点,过Q作l的垂线,垂足为R,试判断直线RP是否过定点.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
名校
解题方法
5 . 已知椭圆
的离心率为
,短轴端点到焦点的距离为2.
(1)求椭圆
的方程;
(2)设
为椭圆
上任意两点,
为坐标原点,且以
为直径的圆经过原点,求证:原点
到直线
的距离为定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2022-01-07更新
|
843次组卷
|
2卷引用:河南省郑州市第七中学2021-2022学年高二上学期期末考试理科数学试题
6 . 已知椭圆
的右焦点为F,过点F的直线(不与x轴重合)与椭圆C相交于A,B两点,直线l:
与x轴相交于点H,过点A作
,垂足为点D.
(1)求四边形OAHB(O为坐标原点)面积的取值范围;
(2)证明:直线BD过定点E,并求出点E的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13b505788d3d02bf232ac637fc3a8ee.png)
(1)求四边形OAHB(O为坐标原点)面积的取值范围;
(2)证明:直线BD过定点E,并求出点E的坐标.
您最近一年使用:0次
2022-07-02更新
|
563次组卷
|
2卷引用:四川省成都市蓉城名校联盟2021-2022学年高二下学期期末联考理科数学试题
名校
解题方法
7 . 椭圆C:
的离心率为
,其左,右焦点分别为
,
,上顶点为B,且
.
(1)求椭圆C的方程;
(2)过点
作关于x轴对称的两条不同的直线
和
,
交椭圆于点
,
交椭圆于点
,且
,证明:直线MN过定点,并求出该定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.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/9b8c45346d277a4cc59807c5263874db.png)
(1)求椭圆C的方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af74113f38fffeed8075e57d7f9d2533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8198c3b302b3820e86763428eb1e91cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3463ced6030af957f13f9ba05b977c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
您最近一年使用:0次
2022-07-02更新
|
875次组卷
|
3卷引用:四川省成都市蓉城名校联盟2021-2022学年高二下学期期末联考文科数学试题
四川省成都市蓉城名校联盟2021-2022学年高二下学期期末联考文科数学试题河北省保定市七校2021-2022学年高一下学期7月联考数学试题(已下线)第25讲 圆锥曲线直线圆过定点问题-【同步题型讲义】2022-2023学年高二数学同步教学题型讲义(人教A版2019选择性必修第一册)
名校
解题方法
8 . 已知点
是椭圆
上的一点,且椭圆
的离心率
.
(1)求椭圆
的标准方程;
(2)两动点
在椭圆
上,总满足直线
与
的斜率互为相反数,求证:直线
的斜率为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5de78b493bc2cc9696c584325c22ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de85df85401e7e8da683ea4a784963c.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)两动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2022-02-17更新
|
3209次组卷
|
3卷引用:山西省晋中市2021-2022学年高二上学期期末数学试题
9 . 如图,已知椭圆
的短轴端点为
、
,且
,椭圆C的离心率
,点
,过点P的动直线l椭圆C交于不同的两点M、N与
,
均不重合),连接
,
,交于点T.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899465969164288/2917464006410240/STEM/063a441e-ecf0-45cd-b955-7907adf0a727.png?resizew=178)
(1)求椭圆C的方程;
(2)求证:当直线l绕点P旋转时,点T总在一条定直线上运动;
(3)是否存在直线l,使得
?若存在,求出直线l的方程;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba43f5ee49eb42aa67d6edcc4511b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d059a0d71bddb677c603d84fac444b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b99738c0ba6ad5af08c609bd57fbc015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6872196eb516b7e6cced75eafa8e3905.png)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899465969164288/2917464006410240/STEM/063a441e-ecf0-45cd-b955-7907adf0a727.png?resizew=178)
(1)求椭圆C的方程;
(2)求证:当直线l绕点P旋转时,点T总在一条定直线上运动;
(3)是否存在直线l,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e403230273076589698d729c8b2abc7c.png)
您最近一年使用:0次
名校
解题方法
10 . 如图,已知椭圆
,
,
分别是长轴的左、右两个端点,
是右焦点.椭圆
过点
,离心率为
.
(1)求椭圆
的方程;
(2)若直线
上有两个点
,
,且
.
①求
面积的最小值;
②连接
交椭圆
于另一点
(不同于点
),证明:
、
、
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8f9648c81481bb487a43f95c04d991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/1235331f-ce13-48fa-bca6-dd45c9c17152.png?resizew=176)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.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/d1fdef703c3c483fe829f600dd6ee613.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5585a42c8f07ad90b94ace9db3d78994.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe61d39d080872caa8973a70a3b4955.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/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
您最近一年使用:0次
2022-02-17更新
|
605次组卷
|
3卷引用:黑龙江省大庆铁人中学2022-2023学年高二上学期期末考试数学试题