名校
解题方法
1 . 已知
和
是平面直角坐标系中两个定点,过动点
的直线
和
的斜率分别为
,
,且
.
(Ⅰ)求动点
的轨迹
的方程;
(Ⅱ)过点
作相互垂直的两条直线与轨迹
交于
,
两点,求证:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e79e069b999b201f3f1111a12e10bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f954a8da05cc9144d4bf86f88e236a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151e09f3a383d7811c619eef3a6398cf.png)
(Ⅰ)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2019-06-18更新
|
1304次组卷
|
4卷引用:四川省宜宾市叙州区第一中学校2019-2020学年高三下学期第二次月考数学(理)试题
名校
2 . 已知椭圆
的两个焦点分别为
,长轴长为
.
(Ⅰ)求椭圆
的标准方程及离心率;
(Ⅱ)过点
的直线
与椭圆
交于
,
两点,若点
满足
,求证:由点
构成的曲线
关于直线
对称.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5439f5ff9bd5deec0f0ef35c6f605b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781b183ab353b9ec98f0f57b722f546e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6a27a9d5d345f1e04020bfea2770ac.png)
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2019-06-04更新
|
1519次组卷
|
10卷引用:2019年12月四川省成都市双流区棠湖中学一模数学(理)试题
2019年12月四川省成都市双流区棠湖中学一模数学(理)试题2019年12月四川省成都市双流区棠湖中学一模数学(文)试题2020届四川省宜宾市第四中学校高三上学期期末考试数学(理)试题2020届四川省宜宾市第四中学校高三上学期期末考试数学(文)试题【区级联考】北京市通州区2019届高三4月第一次模拟考试数学(理科)试题(已下线)2020届高三12月第01期(考点08)(文科)-《新题速递·数学》(已下线)2020届高三12月第01期(考点08)(理科)-《新题速递·数学》(已下线)专题06 平面向量在解析几何中的应用(第五篇)-2020高考数学压轴题命题区间探究与突破(已下线)专题05 平面解析几何——2020年高考真题和模拟题文科数学分项汇编(已下线)专题1 解析几何与平面向量
3 . 已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5563df225901b03c51b139684de04bd1.png)
的离心率为
,短轴长为2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/2eaa371f-e998-4332-81bb-58991ace1bfb.png?resizew=219)
(1)求椭圆
的方程;
(2)已知直线
与
轴交于点
,过点
的直线
与
交于
、
两点,点
为直线
上任意一点,设直线
与直线
交于点
,记
,
,
的斜率分别为
,
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5563df225901b03c51b139684de04bd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f82eb4ba631d0f50d848aa6e576b379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/2eaa371f-e998-4332-81bb-58991ace1bfb.png?resizew=219)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.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/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed1e9cdd5a82f29ec89b2c53b4fa6f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4602fefda18bd0764dfb40e60e36acd3.png)
您最近一年使用:0次
2019-05-05更新
|
726次组卷
|
3卷引用:四川省成都市青羊区树德协进中学2018-2019学年高二下学期期中数学理科试题
4 . 已知点M到定点
的距离和它到直线
的距离的比是常数
.
求点M的轨迹C的方程;
若直线l:
与圆
相切,切点N在第四象限,直线与曲线C交于A、B两点,求证:
的周长为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b3934065616c2e80d4be67a68291d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a532ae111a45852e8824cab3258e3b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba564f8149fb98ee50c4012f06708382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91570f6a5d4fdf7c757212083f2f06af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a4c3d1d76ee04f281aaef5f99a41a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a91951d25de4e2789191ca07c230834e.png)
您最近一年使用:0次
5 . 椭圆
:
的长轴长为4,离心率为
.
(1)求椭圆
的方程;
(2)若直线
:
交椭圆
于
,
两点,点
在椭圆
上,且不与
、
两点重合,直线
,
的斜率分别为
,
.求证:
,
之积为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.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/ac047e91852b91af639feec23a9598b2.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/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e029cc1f7d07eeb136bd3946a7eb23e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32410867843f1a7ef11410da8f3f8dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e029cc1f7d07eeb136bd3946a7eb23e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32410867843f1a7ef11410da8f3f8dab.png)
您最近一年使用:0次
2019-04-13更新
|
568次组卷
|
2卷引用:【校级联考】四川省教考联盟2019届高三第三次诊断性考试数学(文)试题
6 . 已知点
与
的距离和它到直线
的距离的比是常数
.
求点M的轨迹C的方程;
设N是圆E:
上位于第四象限的一点,过N作圆E的切线
,与曲线C交于A,B两点
求证:
的周长为10.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6cc602f5b22673491f481152b49327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b3934065616c2e80d4be67a68291d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a532ae111a45852e8824cab3258e3b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba564f8149fb98ee50c4012f06708382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a4c3d1d76ee04f281aaef5f99a41a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249c87e94a557b034179b25f97699b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a91951d25de4e2789191ca07c230834e.png)
您最近一年使用:0次
7 . 如图,在平面直角坐标系xOy中, 已知圆O:x2+y2=4,椭圆C:
+y2=1,A为椭圆右顶点.过原点O且异于坐标轴的直线与椭圆C交于B,C两点,直线AB与圆O的另一交点为P,直线PD与圆O的另一交点为Q,其中D(-
,0).设直线AB,AC的斜率分别为k1,k2.
![](https://img.xkw.com/dksih/QBM/2020/1/16/2378540545843200/2379898759782400/STEM/259859d800b349a29cece5878e02e3e5.png?resizew=120)
(1) 求k1k2的值;
(2) 记直线PQ,BC的斜率分别为kPQ,kBC,是否存在常数λ,使得kPQ=λkBC?若存在,求λ的值;若不存在,说明理由;
(3) 求证:直线AC必过点Q.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de95471bb6c16acb4fd84d8315e6a637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c55e4f3eda94bc505f103b10bc1fee7.png)
![](https://img.xkw.com/dksih/QBM/2020/1/16/2378540545843200/2379898759782400/STEM/259859d800b349a29cece5878e02e3e5.png?resizew=120)
(1) 求k1k2的值;
(2) 记直线PQ,BC的斜率分别为kPQ,kBC,是否存在常数λ,使得kPQ=λkBC?若存在,求λ的值;若不存在,说明理由;
(3) 求证:直线AC必过点Q.
您最近一年使用:0次
2020-01-18更新
|
634次组卷
|
11卷引用:四川省广元市高2018届高三第二次高考适应性统考文科数学试题
四川省广元市高2018届高三第二次高考适应性统考文科数学试题四川省广元市2018届高三第二次高考适应性统考理科数学试题四川省泸州高级中学校2022届高三五月月考数学(理)试题2016届江苏省泰州市高三第一次模拟考试理科数学试卷2016届江苏省清江中学高三下学期周练数学试卷12016届黑龙江大庆实验中学高三考前训练一文科数学试卷2016届黑龙江大庆实验中学高三考前训练一理科数学试卷福建省莆田第九中学2018届高三上学期期中考试数学(理)试题【全国百强校】黑龙江省哈尔滨市第六中学2017-2018学年高二下学期期末考试数学(理)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)专题45 盘点圆锥曲线中的定点问题——备战2022年高考数学二轮复习常考点专题突破
名校
解题方法
8 . 已知
为椭圆
上三个不同的点,
为坐标原点,且
为
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/ed0d66e8-16a2-4cbb-9ec2-8e615745044b.png?resizew=199)
(1)如果直线
、
的斜率都存在,求证:
为定值;
(2)试判断
的面积是否为定值,如果是就求出这个定值,否则请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff1455a4045eb93f482c0751840aea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/ed0d66e8-16a2-4cbb-9ec2-8e615745044b.png?resizew=199)
(1)如果直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70368971462ca516a9a9b03fbaa8e81.png)
(2)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2018-08-15更新
|
638次组卷
|
4卷引用:四川省成都市龙泉驿区第一中学校2019届高三上学期入学考试数学(理)试题
四川省成都市龙泉驿区第一中学校2019届高三上学期入学考试数学(理)试题湖北省部分重点中学2018-2019学年度上学期新高三开学考试数学(理科)试题【全国百强校】山东省枣庄第八中学2019届高三12月月考数学(理)试题(已下线)考点53 圆锥曲线的综合问题-定点、定值和探索性问题(考点专练)-备战2021年新高考数学一轮复习考点微专题
名校
9 . 已知A(-2,0),B(2,0)为椭圆C的左、右顶点,F为其右焦点,P是椭圆C上异于A,B的动点,且△APB面积的最大值为
.
(Ⅰ)求椭圆C的方程;
(Ⅱ)直线AP与椭圆在点B处的切线交于点D,当点P在椭圆上运动时,求证:以BD为直径的圆与直线PF恒相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(Ⅰ)求椭圆C的方程;
(Ⅱ)直线AP与椭圆在点B处的切线交于点D,当点P在椭圆上运动时,求证:以BD为直径的圆与直线PF恒相切.
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2018-08-06更新
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5卷引用:四川省绵阳南山中学2020届高三下学期第四次诊断模拟数学(文)试题
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10 . 设
为椭圆
的左右焦点,
为椭圆上一点,满足
,已知三角形
的面积为1.
(1) 求
的方程:
(2) 设
的上顶点为
,过点(2,-1)的直线与椭圆交于
两点(异于
),求证: 直线
和
的斜率之和为定值,并求出这个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197c241d356926f79708a700e3629b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abc184db5cf454d226afa73a303e4d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2328dd61f5117580006176fd96e5774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1412fe94766a47fa5b442defa2a3e2e2.png)
(1) 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2) 设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3aa3ce0327a2f5d4999b99fb612bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c6eb5bb1587107bb7a15e0ece60ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b4d8e4e47b2e4b394151493ca8e20d.png)
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3卷引用:四川省内江市内江市第六中学2020-2021学年高二下学期04月月考数学文科试题