已知椭圆
的左、右顶点分别为A,B.直线l与C相切,且与圆
交于M,N两点,M在N的左侧.
(1)若
,求l的斜率;
(2)记直线
的斜率分别为
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812af758672db7576ad2a72eb1061248.png)
(2)记直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e4d7503a7d57ba242ad4e05c7006a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4757181824e15e0f21e5bdd55448783.png)
更新时间:2023-03-09 10:55:10
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】在平面直角坐标系
中,
,
是
一条直径的两个端点:
(1)求
的标准方程;
(2)若直线
过点
,与
相交于
,
两点,且
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5ab74296abcbcf994c02b5834cd699.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5ab74296abcbcf994c02b5834cd699.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aab000962b3e21db0bd949eb7a0d6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5ab74296abcbcf994c02b5834cd699.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/a14a85d5d71e238da9f4e499faec0f30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】已知圆
的圆心在直线
上,且与
轴相切于点
.
(1)求圆
的方程;
(2)若圆
与直线
交于
两点,_____________,求
的值.
从下列三个条件中任选一个补充在上面问题中并作答:条件①:
;条件②:
;条件③:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f7fbfa2214ca72495a993b2fed8b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ffe38683d2aedcb995f5e92faa8c35f.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a8ba78658831f9fce13aafa1d93973.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
从下列三个条件中任选一个补充在上面问题中并作答:条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19efd2f2662ca444c784b69e35f53120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c86c51a576ecc1616f4d9d0ef0fb6588.png)
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解答题-问答题
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解题方法
【推荐1】一动圆与已知
:
相外切,与
:
相内切.
(Ⅰ)求动圆圆心的轨迹C;
(Ⅱ)若轨迹C与直线y="kx+m" (k≠0)相交于不同的两点M、N,当点A(0,
1)满足|
|=|
| 时,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6a2c03b88b9ac5d5641e30f64a462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afb32af713fad738618fc1b0e4814d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8ef224337c60baeb1327f4f1973a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9eb9181eb16b30e3db796d72ca4cd7c.png)
(Ⅰ)求动圆圆心的轨迹C;
(Ⅱ)若轨迹C与直线y="kx+m" (k≠0)相交于不同的两点M、N,当点A(0,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f07ee9754aa1598263c6679405fde4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a56dde7c9f7c3795be0e297297dccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24bd7766fb984077dca3baa536e6d99.png)
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【推荐2】设
分别是平面直角坐标系中
轴正方向上的单位向量,若向量
,
,且
,其中
.
(1)求动点
的轨迹
的方程;
(2)过点
作直线
与轨迹
交于
,
两点,设
,是否存在直线
,使得四边形
是矩形?若存在,求出直线
的方程;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b376994db04a1b29e2f82903fe3ffd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a558cf06cefdedadea47f68d2dc05f46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4d93da111d80ffaa3bc186c3509f24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0788cab51381b93bff2d938a2a522012.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ff7e0ef1f622120cc1b18e9d3e80ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623afc24f2227004b0e1b3922dfb954b.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff51d38fdcb552216b2ef94fa75be39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e902eb263971b466d0fcd91c56b453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐1】已知椭圆
,
为椭圆与
轴的一个交点,过原点
的直线交椭圆于
两点,且
,
.
(1)求此椭圆的方程;
(2)若
为椭圆上的点且
的横坐标
,试判断
是否为定值?若是定值,求出该定值;若不是定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21604721bb7cd8036ec14c16923b357c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06be89a7df58baa1216bb661c6e42804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36dfbc843b72d55db0296dd9d08dcca2.png)
(1)求此椭圆的方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b53a13c6aa2f8f1848693da2e7687a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f490f4ec99d2793087c396a44c56039c.png)
![](https://img.xkw.com/dksih/QBM/2011/2/19/1570001518731264/1570001524277248/STEM/89de7f42fd0f4ba6aea673ea80cf4f74.png?resizew=228)
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【推荐2】.已知
且
,若要使
是定值,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dfcb8f353a9a4ec728d1af3454fef27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a369ce3949b2bd2747a48054f7b951c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7416534ef7727b6b7b057a7ae54172.png)
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