解题方法
1 . 已知椭圆
的左、右焦点分别为
,离心率
,点
在E上.
(1)求E的方程;
(2)过点
作互相垂直且与x轴均不重合的两条直线分别交E于点A,B和C,D,若M,N分别是弦AB,CD的中点,证明:直线MN过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a200ca2c4af794f4d1c6a5443830b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc2210a7e09298897f6585ad08a70d3.png)
(1)求E的方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
您最近一年使用:0次
解题方法
2 . 已知椭圆
的离心率是
,
,
分别是椭圆的左、右焦点,
是椭圆上一点,且
的周长是
.
(1)求椭圆
的标准方程;
(2)若直线
与椭圆
交于
,
两点,
是坐标原点,且四边形
是平行四边形,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb6f3d7540831a9e97d3b184a491.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/ae96f5020aef5aef03ec7f406460f608.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40b8789cc8d81b3cf64f0b318ab982a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40b8789cc8d81b3cf64f0b318ab982a.png)
您最近一年使用:0次
3 . 已知椭圆
:
(
)的右焦点为
,短轴长是长轴长的
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/38ada9f9-13d5-4d20-9ac4-183e0fc8c3ac.png?resizew=207)
(1)求椭圆的方程;
(2)
是椭圆
上的动点,过点
作椭圆
的切线
,
与直线
交于点
,若
(
为坐标原点)的面积为
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/38ada9f9-13d5-4d20-9ac4-183e0fc8c3ac.png?resizew=207)
(1)求椭圆的方程;
(2)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc02f00cf00a6dfd88b53a90f1f7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04702611fa1d3e01a4fc93e1c5cc6a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2023-03-23更新
|
772次组卷
|
4卷引用:甘肃省定西市2022-2023学年高三下学期教学质量检测考试理科数学试题
甘肃省定西市2022-2023学年高三下学期教学质量检测考试理科数学试题(已下线)专题16解析几何(解答题)(已下线)考点15 直线与圆锥曲线相切问题 2024届高考数学考点总动员天津市和平区耀华中学2024届高三上学期期末数学试题
解题方法
4 . 已知双曲线C:
的离心率为
,点
在双曲线上.
(1)求双曲线C的方程;
(2)若A,B为双曲线的左、右顶点,
,若MA与C的另一交点为P,MB与C的另一交点为Q(P与A,Q与B均不重合)求证:直线PQ过定点,并求出定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12044661d15a805a90206c16f6e8a7d.png)
(1)求双曲线C的方程;
(2)若A,B为双曲线的左、右顶点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fb95c0dbba2ce77a7dcc42fa06e058.png)
您最近一年使用:0次
2023-03-11更新
|
518次组卷
|
3卷引用:甘肃省张掖市2023届高三下学期4月联考数学(理)试题
5 . 已知
,
是椭圆
:
的左右顶点,过点
且斜率不为零的直线与
交于
,
两点,
,
,
,
分别表示直线
,
,
,
的斜率,则下列结论中正确的是( )
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f449cadb49859b80c31ef1f68bfe81b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/1a6f62ec9c0e58b3f1c363158269b14d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beda1e02b3e6e9e9448a5a4087ea838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ff131c92aa9e10f696d374216cdcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0721e40e4c6929a24c54d2035c4014a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
A.![]() | B.![]() |
C.![]() | D.直线![]() ![]() ![]() |
您最近一年使用:0次
2023-07-06更新
|
646次组卷
|
3卷引用:甘肃省天水市第一中学2023-2024学年高二下学期开学考试数学试题
名校
6 . 已知
,
分别为双曲线C:
(
,
)的左、右焦点,
的一条渐近线
的方程为
,且
到
的距离为
,点
为
在第一象限上的点,点
的坐标为
,
为
的平分线
则下列正确的是( )
![](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/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cc81cfaccc00aa4b7139de5a35a102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf20cf8a2912b42998a7cd163f870d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e1d0f65817ba32a732040518f41440.png)
A.双曲线的方程为![]() | B.![]() |
C.![]() | D.点![]() ![]() ![]() |
您最近一年使用:0次
2023-02-14更新
|
1376次组卷
|
7卷引用:甘肃省天水市第一中学2024届高三上学期第三次月考数学试题
名校
解题方法
7 . 已知
,
分别为双曲线C:
的左、右焦点,过点
作垂直于x轴的直线,与双曲线C交于点M,N,且三角形
为等边三角形,双曲线C与x轴两交点间距离为2.
(1)求双曲线C的方程;
(2)设过
的直线与双曲线C交于A,B两点,是否存在一个定点P使
为定值?如果存在,求出点
坐标;如果不存在,请说明理由.
![](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/3040b6c904477030ecf8ba20b2b18759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589e32ceb302a6b21faa2b9835e05096.png)
(1)求双曲线C的方程;
(2)设过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25fe3ff55350310998d3d4f0048b45a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59880e470359d8e9faf6ae5ce155cf2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2023-01-16更新
|
355次组卷
|
4卷引用:甘肃省武威市天祝藏族自治县第一中学2022-2023学年高二上学期期末考试数学试题
8 . 设抛物线
的焦点为F,过F作斜率为1的直线交抛物线于A,B两点,且
,Q为抛物线上一点,过Q作两条均不垂直于对称轴的直线分别交抛物线于除Q之外的M、N两点.
(1)求C的方程;
(2)若Q坐标为
,且
,判断MN斜率是否为定值,若是,求出该值,若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af7af6671cc2122185caa024ceaa2d3b.png)
(1)求C的方程;
(2)若Q坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6bd5eb6efcc430fc97fdae8e571c688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c501a8f0f54e312d18bdc83a7c9b9fba.png)
您最近一年使用:0次
2023-01-15更新
|
457次组卷
|
5卷引用:甘肃省天水市田家炳中学2022-2023学年高三下学期开学考试数学(文科)试题
名校
解题方法
9 . 已知椭圆
的左,右焦点分别为
,上顶点为
,且
为等边三角形.经过焦点
的直线
与椭圆
相交于
两点,
的周长为8.
(1)求椭圆
的方程;
(2)求
的面积的最大值及此时直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4df8816403d7f16b505ffc4a3574204d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ff8a5886e42095da57422c8777c10d.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ff8a5886e42095da57422c8777c10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2023-01-14更新
|
885次组卷
|
4卷引用:甘肃省天水市甘谷县第四中学2022-2023学年高二上学期期末数学试题
10 . 已知动点P到直线
的距离是P到点
距离的2倍,点P的轨迹记为C.
(1)证明:存在点
,使得
为定值.
(2)过点F且斜率
的直线l与C交于A,B两点,M,N为x轴上的两个动点,且
,
,若
,求k.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
(1)证明:存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ed50b7ddc736c4a2fad6a58135e03f.png)
(2)过点F且斜率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d99e9ab44437147165c319705daad0fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339f691f01e9fb0e30570d5daad31002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0dc4ea85e09c94960e4f1c20657e117.png)
您最近一年使用:0次
2023-01-09更新
|
413次组卷
|
4卷引用:甘肃省靖远县第一中学等2校2023届高三上学期期末理科数学试题