1 . 已知椭圆
:
的左、右焦点分别为
、
,以点
为圆心,以3为半径的圆与以点
为圆心,以1为半径的圆相交,且交点在椭圆
上.设点
,在
中,
.
(1)求椭圆
的方程;
(2)设过点
的直线
不经过点
,且与椭圆
相交于
,
两点,若直线
与
的斜率分别为
,
,求
的值.
![](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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bfdab8b0494d22a788fd0a34258abd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc7080a72f92adf5f57daf281fd359c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9092a8273b552fe175b28fbed6953837.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879080beb1e55cae2639645cd64c4710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.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/b69e3f7ddd51215d00661c09cd900d60.png)
您最近一年使用:0次
2018-04-20更新
|
760次组卷
|
2卷引用:江西省2018届高三毕业班新课程教学质量监测数学(文)试题
11-12高二上·山东济宁·阶段练习
名校
2 . 在平面直角坐标系
中,点
到两点
的距离之和等于4,设点
的轨迹为曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
的方程;
(2)设直线
与
交于
两点,
为何值时
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76c5a0c8dff254d560ab24e51e0b136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.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/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb74745f1d6a291a7422feb93c27dbc.png)
您最近一年使用:0次
2019-12-07更新
|
1194次组卷
|
14卷引用:2011-2012学年山东省邹城二中高二上学期期中文科数学试卷
(已下线)2011-2012学年山东省邹城二中高二上学期期中文科数学试卷2015-2016学年山东寿光现代中学高二12月月考理数学卷2015-2016学年山东寿光现代中学高二12月月考文数学卷(已下线)2011-2012学年湖北武汉部分重点中学(五校)高二下期中文科数学卷(已下线)2013-2014学年河南省濮阳市高二下学期升级考试理科试卷(A卷)(已下线)2013-2014学年河南省濮阳市高二下学期升级考试理科数学试卷(A)智能测评与辅导[文]-圆锥曲线的综合应用上海市宝山区扬波中学2017-2018学年高二上学期期末数学试题上海市杨浦区2016-2017学年高二下学期期中数学试题上海市华东师范大学第三附属中学2015-2016学年高二下学期期中(理)数学试题四川省阆中中学2019-2020学年高二4月月考数学(文)试题云南省保山市第九中学2020-2021学年高二9月质量检测数学(文)试题河北省张家口市第一中学2021届高三(衔接班)上学期期中数学试题内蒙古呼和浩特市2021-2022学年高二上学期期末考试数学(理)试题
名校
3 . 椭圆的两个焦点分别为
、
,且椭圆上一点到两个焦点的距离之和是20,则椭圆的方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c8a3b189f23eedcf27bd20bf17653e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f91375b4a3254c9be9f359cd37202ab4.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2018-11-11更新
|
2073次组卷
|
11卷引用:2014-2015学年山东省济南第一中学高二上学期期末考试数学试卷
2014-2015学年山东省济南第一中学高二上学期期末考试数学试卷【全国百强校】山东省济南第一中学2018-2019学年高二上学期期中考试数学试题2015-2016学年河北省邯郸市曲周一中高二上第二次月考文科数学试卷(已下线)2019年1月6日 《每日一题》理数(高二上期末复习)人教必修5+选修2-1-每周一测江苏省苏州市2019-2020学年高二上学期期末数学试题人教A版(2019) 选择性必修第一册 过关斩将 第三章 圆锥曲线的方程 3.1 椭圆 3.1.1 椭圆及其标准方程江苏省南通市平潮高级高中2020-2021学年高二上学期12月学情检测数学试题黑龙江省大兴安岭实验中学(西校区)2020-2021学年高二上学期期中考试数学试题(已下线)课时3.1.1 椭圆(01)椭圆及其标准方程-2021-2022学年高二数学同步练习和分类专题教案(人教A版2019选择性必修第一册)2021年黑龙江省普通高中学业水平考试数学试题(已下线)专题06 椭圆的压轴题(6类题型+过关检测)-【常考压轴题】2023-2024学年高二数学上学期压轴题攻略(人教A版2019选择性必修第一册)
名校
4 . 设点
,
,若
的周长为
,则动点
的轨迹方程是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace57db024d8a0a1cb59505b0652b919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8febb879c88dff8b18a2362f2dfbc37d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b837fd9c52f60bfb3b6852733abc790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
5 . 如图,点
是圆
内的一个定点,点
是圆
上的任意一点,线段
的垂直平分线
和半径
相交于点
,当点
在圆
上运动时,点
的轨迹为曲线
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/7ec28d54-6c50-43c4-b93f-48cbc7b8e364.png?resizew=178)
(1)求曲线
的方程;
(2)点
,
,直线
与
轴交于点
,直线
与
轴交于点
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/513eafd10fa1ec0196562865517e0b09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db913f194627b21fae0c9ceaf40033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/7ec28d54-6c50-43c4-b93f-48cbc7b8e364.png?resizew=178)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5b6926cdb99eb58070b8720718f71a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2347bec7975dab2b8bce2fd19b1237d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3d566704b44ea4ef1f99c37bd46902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8db072e2b6104671b82f948012fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352de28eb812dc02a7f85bff053fb7ed.png)
您最近一年使用:0次
2018-01-08更新
|
609次组卷
|
2卷引用:山东省济宁市2017-2018学年度高三上学期期末考试 数学(理)试题
名校
解题方法
6 . 已知椭圆C:
的左、右焦点分别为
,
且离心率为
,过左焦点
的直线l与C交于A,B两点,
的周长为
.
求椭圆C的方程;
当
的面积最大时,求l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09a8ac969e5cec3be6abf4ff44c692e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6758b8b074d33ea9e82818593656e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78c38805c09dcfbcc42103308975a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09a8ac969e5cec3be6abf4ff44c692e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddec92f798aa2a4e3e13d2c65adf20d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67bee78e4e358531389b3aad07e70bc.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/ddec92f798aa2a4e3e13d2c65adf20d0.png)
您最近一年使用:0次
2017-11-17更新
|
3394次组卷
|
4卷引用:【区级联考】山东省临沂市罗庄区2017-2018学年高二上学期期末考试数学(理)试题
解题方法
7 . 已知圆
,点
,
是圆
上任意一点,线段
的垂直平分线交
于点
,当点
在圆上运动时,点
的轨迹为曲线
.
1
求曲线
的方程;
2
若直线
与曲线
相交于
两点,
为坐标原点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c4679c41a3760e29bea966b13cbaad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f911e0ed2429ab67c269cb0ff60ef218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a461995b90655f5133df6f61c2d09bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91570f6a5d4fdf7c757212083f2f06af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baefc8a9b711ab9f3741491fd298a119.png)
您最近一年使用:0次
2017-05-13更新
|
2113次组卷
|
4卷引用:山东省枣庄市2020-2021学年高二上学期期中数学试题
8 . 双曲线
的左右焦点分别为
,椭圆
与双曲线
有公共的焦点,且
在第一象限和第四象限的交点分别为
,弦
过
,则椭圆
的标准方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538122bffbada01c55f42183ef59c8ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c071706fc84d4ed3f860e26a9f3fcc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13d726b14a313e000a81526162f35748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 已知椭圆
:
的右焦点为
,且点
在椭圆
上.
(1)求椭圆
的标准方程;
(2)已知动直线
过点
,且与椭圆
交于
两点.试问
轴上是否存在定点
,使得
恒成立?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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f122dc124d609e6afd281abefbbe0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知动直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f905b55bceeaa402892bea48bdf6bd2.png)
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10卷引用:2017届山东省师大附中高三第三次模拟考试数学(理)试卷
2017届山东省师大附中高三第三次模拟考试数学(理)试卷2015-2016学年四川省攀枝花十五中高二上学期期中理科数学试卷2016届湖北省优质高中高三下学期联考理科数学A卷2015-2016学年四川省攀枝花市十五中高二上学期期中理科数学试卷2015-2016学年江西省抚州市南城一中高二3月月考理科数学试卷2017届广东省广雅中学、江西省南昌二中高三下学期联合测试理数试卷吉林省白城市通榆县第一中学2018-2019学年高二下学期第三次月考(期中)数学(理)试题安徽省滁州市定远县重点中学2020届高三下学期6月模拟数学(理)试题山西省大同市2022届高三上学期学情调研测试数学(理)试题(已下线)专题34 圆锥曲线存在性问题的探究
10 . 已知点
是圆
上的任意一点,点
为圆
的圆心,点
与点
关于原点对称,线段
的垂直平分线与线段
交于点
.
(Ⅰ)求动点
的轨迹
的方程;
(Ⅱ)设点
,若直线
轴,且与曲线
交于另一点
,直线
与直线
交于点
.
(1)证明:点
恒在曲线
上;
(2)求
面积的最大值.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/b32cc70e16444a5d8f39a1499d9fc4fe.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/a600941dffe64e66aa1e9d525a27384c.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/959545667d2041d6b3ff962950508cb4.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/959545667d2041d6b3ff962950508cb4.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/687bf65355354e218d84d5a66933d5bb.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/959545667d2041d6b3ff962950508cb4.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/3ee7b3fc7fb5496ea17a874a01c04bc8.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/f6051466f5c8485fad161feb12cc42fc.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/5f0380f65773446eb5601d3c5c192c4b.png)
(Ⅰ)求动点
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/5f0380f65773446eb5601d3c5c192c4b.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/657d1d60a7224c34b554a4e81af7f16f.png)
(Ⅱ)设点
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/2615fa7a2b4b4c9fa5234c17d8ca3d16.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/394bcb75d817442aa8bff698d6752797.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/657d1d60a7224c34b554a4e81af7f16f.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/52d8b5dbcbaf4ec0b646183dda384ecb.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/2e7410da15f3401e9078e8be345a8781.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/79ad8bd4d45a4f6596d881ae130d5efb.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/9c97577743e54f18bb34c1681700730e.png)
(1)证明:点
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/9c97577743e54f18bb34c1681700730e.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/657d1d60a7224c34b554a4e81af7f16f.png)
(2)求
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572674305785856/1572674312085504/STEM/f588a1d9b8684b17bfc93e132d006d18.png)
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