1 . 已知圆
,动圆
过点
且与圆
相切,记动圆圆心
的轨迹为曲线
.
(1)求曲线
的方程;
(2)
,
是曲线
上的两个动点,且
,记
中点为
,
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f04481a59ee4c1b70d53a05d7d1d965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be92f0e0012a7696c78e3e00513edefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7df99fe6438442a9453fc0c57fb703.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/52e0491545b60c2adc386b6827c8c46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2021-02-03更新
|
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2卷引用:甘肃省敦煌市2021届高三三模数学(文)试题
名校
解题方法
2 . 已知点
,
是圆
上的一个动点,
为圆心,线段
的垂直平分线与直线
的交点为
.
(1)求点
的轨迹
的方程;
(2)设
与
轴的正半轴交于点
,直线
与
交于
两点(
不经过
点),且
,证明:直线
经过定点,并写出该定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6646d9c6c20271a95c43b72541789efc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485a2c61a0d3f528681ff54c819e0f44.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/acc290b44635265137fdf13146b6a6d9.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c6c818df102a83ce5159e3208d01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2019-04-08更新
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1661次组卷
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3卷引用:【市级联考】甘肃省白银市(学科基地命制)2019届高三模拟(5月)数学(文)试题
名校
3 . 如图,椭圆
经过点
,且点
到椭圆的两焦点的距离之和为
.
(l)求椭圆
的标准方程;
(2)若
是椭圆
上的两个点,线段
的中垂线
的斜率为
且直线
与
交于点
,
为坐标原点,求证:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c6c165696e06db3c99640efea78d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
(l)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbbc9c5353894f2c93c205c3ac04f03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cce6cac0fdd4b1a434af8bcaec8fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cce6cac0fdd4b1a434af8bcaec8fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc4a11180bbca41602777e91d59b9bc.png)
![](https://img.xkw.com/dksih/QBM/2018/5/1/1935767659257856/1936534667313152/STEM/2161f9b694a74c3486c35f25f8ca3862.png?resizew=176)
您最近一年使用:0次
2018-05-02更新
|
1121次组卷
|
12卷引用:甘肃省白银市会宁县第一中学2019-2020学年高二上学期期末数学(文)试题
甘肃省白银市会宁县第一中学2019-2020学年高二上学期期末数学(文)试题甘肃省定西市临洮县文峰中学2021-2022学年高二下学期期中考试数学(理)试题【全国市级联考】辽宁省朝阳市普通高中2018届高三第三次模拟考试数学(理)试题安徽省六安市毛坦厂中学2018届高三下学期四月月考数学(理)试题【全国市级联考】辽宁省朝阳市普通高中2018届高三第三次模拟考试数学(文)试卷安徽省六安市毛坦厂中学2018届高三下学期四月月考数学(文)试题【全国百强校】广西柳州二中2017-2018学年高二下学期段考数学(理)试题贵州省铜仁市西片区高中教育联盟2017-2018学年高二下学期期末考试数学(理)试题安徽卓越县中联盟(舒城中学、无为中学等)2019-2020学年高二12月素质检测数学(文)试题黑龙江省鹤岗市工农区第一中学2019-2020学年高二上学期期末数学(文)试题(已下线)【新教材精创】2.5.1+椭圆的标准方程-B提高练-人教B版高中数学选择性必修第一册(已下线)【新教材精创】3.1.1+椭圆及其标准方程-B提高练-人教A版高中数学选择性必修第一册
4 . 在平面直角坐标系
中,点
,圆
,点
是圆上一动点,线段
的中垂线与线段
交于点
.
(1)求动点
的轨迹
的方程;
(2)若直线
(斜率存在)与曲线
相交于
两点,且存在点
(其中
不共线),使得
被
轴平分,证明:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4a7482cb81b34df5a11807b8136a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2318198ef9e33345071a454dff2acdb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0064b3966f15d9b1754c251514b15909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c6f8a0db9d6a46cfcc28c666fdab897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adb619ca92790d5d3fa7652210ff8eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65183d238c9bc2be73770717d890683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2018-04-06更新
|
613次组卷
|
2卷引用:甘肃省天水市第一中学2017-2018学年度下学期高三第二次模拟 考试 数学(理科)试题
5 . 已知圆
的公共点的轨迹为曲线
,且曲线
与
轴的正半轴相交于点
.若曲线
上相异两点
、
满足直线
,
的斜率之积为
.
(Ⅰ)求
的方程;
(Ⅱ)证明直线
恒过定点,并求定点的坐标;
(Ⅲ)求
的面积的最大值.
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/17f935a5f1004a0f988c6101e1ddd283.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/01c5b12218ab4b2d86f44acfe35eb5b8.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/01c5b12218ab4b2d86f44acfe35eb5b8.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/a6eee98781fc4cb8b54e741671296a7a.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/de895146279c4d41ad6d987f3934cd65.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/01c5b12218ab4b2d86f44acfe35eb5b8.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/fcbb04cd03654960a85c19ad1cbaa278.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/424e33063fdf418cad45d75129549408.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/37a59a7dee5740ecb353d4bb6780d3a2.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/d3da3f091d244a4cbe18e39aa26f0f46.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/bdd7bd0fd7da45ca840f019d04e38e67.png)
(Ⅰ)求
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/01c5b12218ab4b2d86f44acfe35eb5b8.png)
(Ⅱ)证明直线
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/4bb885dba61349059026aec0b8e08118.png)
(Ⅲ)求
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937499136/STEM/e6c164360c3b4118b33b3432063839f2.png)
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2016-12-03更新
|
6235次组卷
|
2卷引用:2015届甘肃省天水市一中高三第五次高考模拟考试理科数学试卷
6 . 在平面直角坐标系中,N为圆C:
上的一动点,点D(1,0),点M是DN的中点,点P在线段CN上,且
.
(Ⅰ)求动点P表示的曲线E的方程;
(Ⅱ)若曲线E与x轴的交点为
,当动点P与A,B不重合时,设直线
与
的斜率分别为
,证明:
为定值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a8dfa9c643db95f387916f715d1a846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce2523274fb399a9c7f70783def74ee.png)
(Ⅰ)求动点P表示的曲线E的方程;
(Ⅱ)若曲线E与x轴的交点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d65bc2ec06351b85b54f54b7f15082.png)
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2016-12-01更新
|
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5卷引用:甘肃省平凉市第二中学2022-2023学年高二上学期期末考试(延考)数学试题
甘肃省平凉市第二中学2022-2023学年高二上学期期末考试(延考)数学试题(已下线)2011-2012学年广东省湛江一中高二第一学期期末考试文科数学河北省邢台市第二中学2019-2020学年高二下学期开学考试数学试题(已下线)第41讲 椭圆-2021年新高考数学一轮专题复习(新高考专版)专题2.7 平面解析几何(A卷基础篇)-2020-2021学年高二数学选择性必修第一册同步单元AB卷(新教材人教B版)