1 . 已知椭圆
的右焦点为
,直线
与椭圆
交于不同的两点
、
.
(1)证明:点
到右焦点
的距离为
;
(2)设点
,当直线
的斜率为
,且
与
平行时,求直线
的方程;
(3)当直线
与
轴不垂直,且△
的周长为
时,试判断直线
与圆
的位置关系,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6de03e2b3bef75237eb998d6e11d3.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/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fba1e1ca5040060dde64c667ec432a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f05eb4c4c6f9e6a702735bc0b5122d0.png)
(1)证明: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/9092dc4bec59c4bc69fa327672ca88bc.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f274a6fb62ddc16a07565d54006985.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/9eeb5f947501edbf247a57c2b61e37b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7e4fad3b1a1698512eaf1366af24ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8be7470f11eed5536f3baf65e3a125d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b25f9ec594431dcb5ac8e28d29b69f.png)
您最近一年使用:0次
2 . 已知椭圆
的左右焦点分别为
,点
为椭圆
上异于顶点的一动点,
的角平分线分别交
轴、
轴于点
.
(1)若
,求
;
(2)求证:
为定值;
(3)当
面积取到最大值时,求点
的横坐标
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e099a6abe3e9566b2ad385906e323fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ef569668e797b1e94257fd5f4384dd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066b9c12f71ed215ed8e98df05584f76.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b0bac6df5da367c886f57d562c72c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
您最近一年使用:0次
2024-02-12更新
|
1973次组卷
|
4卷引用:浙江省金丽衢十二校2023-2024学年高三上学期第一次联考数学试题
名校
解题方法
3 . 已知点
,
是椭圆
的两个焦点,椭圆上的任意一点P使得
,且
的最大值为
.
(1)求椭圆的标准方程;
(2)若直线l与椭圆C交于A,B两点(A,B不是左右顶点),且以AB为直径的圆经过椭圆的右顶点.求证直线l过定点,并求出该定点的坐标.
![](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/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f595683f69d5d6b5ca76408b0ff6ff17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ef569668e797b1e94257fd5f4384dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec96333ce215db10a533acaa92b5103f.png)
(1)求椭圆的标准方程;
(2)若直线l与椭圆C交于A,B两点(A,B不是左右顶点),且以AB为直径的圆经过椭圆的右顶点.求证直线l过定点,并求出该定点的坐标.
您最近一年使用:0次
2022-11-26更新
|
919次组卷
|
5卷引用:内蒙古自治区包头市第一中学2022-2023学年高二上学期期中考试理科数学试题
内蒙古自治区包头市第一中学2022-2023学年高二上学期期中考试理科数学试题(已下线)数学(新高考Ⅱ卷A卷)(已下线)微点5 塞瓦定理、富瑞基尔定理、笛沙格定理、彭塞列闭合定理综合训练广东省汕头市金禧中学2024届高三上学期第一次阶段考数学试题内蒙古鄂尔多斯市西四旗2023-2024学年高二上学期期末数学试题
2022高三·全国·专题练习
解题方法
4 . 设椭圆
的中心在原点,焦点
在
轴上,垂直
轴的直线与椭圆相交于
、
两点,当
的周长取最大值
时,
.
(1)求椭圆
的方程;
(2)过圆
上任意一点
作椭圆
的两条切线
、
,直线
、
与圆
的另一交点分别为
、
,
①证明:
;
②求
面积的最大值.
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/2eaceb8d6c6927e14d9ac7a557a2b11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952bed919d4699654bc22c1ca426e6b1.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823e3ff20552de4446476943b74f5af7.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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
①证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
您最近一年使用:0次
21-22高二·江苏·课后作业
5 . 已知
,
.记
,
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffdaf7c301cb50fe15ede47a4e10d6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57654bf131df03b31d3d11b5b656c73d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5076829e649b3f3866d4a7e07a5713e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697c20fca284394bf5d5b9e5f6d952e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a85b64ff0767fc8569421bda2cfe42.png)
您最近一年使用:0次
21-22高二·全国·课后作业
6 . 证明:以椭圆C:
(
)的焦点F为圆心的圆与该椭圆最多有两个公共点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
您最近一年使用:0次
2022-03-06更新
|
178次组卷
|
3卷引用:复习题二1
解题方法
7 . 祖暅(公元5—6世纪,祖冲之之子),是我国齐梁时代的数学家,他提出了一条原理:“幂势既同,则积不容异.”这句话的意思是:两个等高的几何体若在所有等高处的水平截面的面积相等,则这两个几何体的体积相等.如图将底面直径皆为
,高皆为
的椭半球体和已被挖去了圆锥体的圆柱体放置于同一平面
上,用平行于平面
且与
距离为
的平面截两个几何体得到
及
两截面,可以证明
总成立,若椭半球的短轴
,长半轴
,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/2/19/2919607826079744/2924797869096960/STEM/8c870d00-2ab2-489d-b8ff-3db9dbcb9513.png?resizew=422)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18436f0e2391b0ab7537a566fc28204c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ef0cd8fc26307d24ac98ea0556464a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173d3e1ca62e4825252dddecbefe7b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/009467e7d7de6caeb1eb01210ccb71ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://img.xkw.com/dksih/QBM/2022/2/19/2919607826079744/2924797869096960/STEM/8c870d00-2ab2-489d-b8ff-3db9dbcb9513.png?resizew=422)
A.椭半球体的体积为30π |
B.椭半球体的体积为15π |
C.如果![]() ![]() ![]() ![]() ![]() |
D.如果![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
名校
解题方法
8 . 已知椭圆
的右焦点分别为F,右顶点为A,P为椭圆C上一点.已知
的最大值为3,最小值为1.
(1)求椭圆C的标准方程;
(2)若直线l:y=kx+m与椭圆C相交于M、N两点(M、N不是左右顶点),且以MN为直径的圆过点A.求证:直线l过定点,并求出该定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4392b26f9107a7c7a475e8abcef093c.png)
(1)求椭圆C的标准方程;
(2)若直线l:y=kx+m与椭圆C相交于M、N两点(M、N不是左右顶点),且以MN为直径的圆过点A.求证:直线l过定点,并求出该定点的坐标.
您最近一年使用:0次
20-21高三下·全国·开学考试
名校
解题方法
9 . 已知椭圆
的上、下顶点分别为
为直线
上的动点,当点
位于点
时,
的面积
,椭圆
上任意一点到椭圆的左焦点
的最短距离为
.
(1)求椭圆
的方程;
(2)连接
,直线
分别交椭圆于
(异于点
)两点,证明:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81687c0af83f550bcb802e2d82c76a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2694c32ca1e120e988012b7ecd74f625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac40d4999115239c33201f438c4eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34e01955f8c8fe2f0041b35d8d602a7.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2021-03-07更新
|
1477次组卷
|
7卷引用:百师联盟2020-2021学年高三下学期开年摸底联考考文科数学试卷(全国Ⅰ卷)
(已下线)百师联盟2020-2021学年高三下学期开年摸底联考考文科数学试卷(全国Ⅰ卷)(已下线)百师联盟2020-2021学年高三下学期开年摸底联考考理科数学试卷(全国Ⅰ卷)江苏省百师联盟2021届高三下学期3月摸底联考数学试题(已下线)专题33 仿真模拟卷02-2021年高考数学(文)二轮复习热点题型精选精练(已下线)专题1.11 圆锥曲线-定点、定值、定直线问题-2021年高考数学解答题挑战满分专项训练(新高考地区专用)江西省上饶市铅山一中2020-2021学年高二下学期第一次月考数学(文)试题百师联盟2021届高三开学摸底联考数学(文)试题
解题方法
10 . 在平面直角坐标系xOy中,曲线C上的点
到点
的距离与它到直线
的距离之比为
,圆O的方程为
,曲线C与x轴的正半轴的交点为A,过原点O且异于坐标轴的直线与曲线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
,设直线AB,AC的斜率分别为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f67daeddff2e805bf34d43e629d959.png)
;
(1)求曲线C的方程,并证明
到点M的距离
;
(2)求
的值;
(3)记直线PQ,BC的斜率分别为
、
,是否存在常数
,使得
?若存在,求
的值,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a2bd33d6b5eafe9eaa30d9d2b8f30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892077030df22daf504ba9c0409ce384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb02410b1d0282c55d4c323c852853b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65015b8835405afa8ca82127ee55d49c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f67daeddff2e805bf34d43e629d959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
(1)求曲线C的方程,并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a2bd33d6b5eafe9eaa30d9d2b8f30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2311721e4e555aaec8411e6a56796342.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4757181824e15e0f21e5bdd55448783.png)
(3)记直线PQ,BC的斜率分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6652d2342b9e97385ef10fcb71db3c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e12d4e98345c00e7daf3168eeeb1ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb20cd08acb3dc9c8b7805d31af8d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2020-02-08更新
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2卷引用:上海市五校2016届高三下学期3月联考数学试题