名校
1 . 已知线段
的端点
的坐标是
,端点A在圆
上运动,
(1)求线段
中点
的轨迹方程;
(2)设点
,记
的轨迹方程所对应的曲线为
,若过点
且在两坐标轴上截距相等的直线与曲线
相切,求
的值及切线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c236126c5ae438a96700f5ae6a3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a34a8f28f26cd2472a6051da27adbd0.png)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd4f70ac3c7a7425ccb2fb31f1299e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
2 . 已知
是椭圆
的两个焦点,
为坐标原点,点
在椭圆上,且
,
是以
为直径的圆,直线
与
相切,并且与椭圆交于不同的两点
.
(1) 求椭圆的标准方程;
(2) 当
,且满足
时,求弦长
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97b622024e4fe8348bf327f62f3a6ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0202066314574be270ff41588296e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ef7d761de0e794fc39937dc72ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1) 求椭圆的标准方程;
(2) 当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6699761bc6b06f2f557dc4a8fd05c26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd30704a29aa12aee831adea646e03f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
![](https://img.xkw.com/dksih/QBM/2018/11/8/2071208495489024/2072499856687104/STEM/7f73852bc28745bcb75db9146ccb0f5a.png?resizew=184)
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2018-11-10更新
|
1287次组卷
|
6卷引用:【全国百强校】河南省信阳高级中学2018-2019学年高二上学期期中考试数学(理)试题
名校
3 . 已知动圆
与圆
外切,与圆
内切.
(1)试求动圆圆心的轨迹
的方程;
(2)与圆
相切的直线
与轨迹
交于
两点,若直线
的斜率成等比数列,试求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f581d0a15670dfbbcf1f97d37d111810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e494274748e0a3d44205fe8c7e4d0fcd.png)
(1)试求动圆圆心的轨迹
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)与圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/44fd2722d23f6fb6d32b54865bd6af70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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名校
解题方法
4 . 已知圆
的方程为
,直线
.
(1)若直线
与圆
相切,求实数
的值;
(2)若直线
与圆
相交于
两点,且
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f72bb4787aa27aaab775773256a6b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1237e78cbf73d72eef777d7d329b8dec.png)
(1)若直线
![](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/36a1b09c653185842513e24ebba60bb3.png)
(2)若直线
![](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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e00ad067ceaf3a8c0452e5cd52a506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2017-05-05更新
|
655次组卷
|
2卷引用:河南省林州市第一中学2016-2017学年高一下学期期中考试数学试题
2014·河南南阳·三模
5 . 已知圆
,直线
与圆
相切,且交椭圆
于
两点,c是椭圆的半焦距,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe8fff55c06f220725f4124e45a1e89.png)
(1)求m的值;
(2)O为坐标原点,若
,求椭圆
的方程;
(3)在(2)的条件下,设椭圆
的左右顶点分别为A,B,动点
,直线
与直线
分别交于M,N两点,求线段MN的长度的最小值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e52ad4d0f284d9e6062fbe095ec455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646aac83fd8e7318c6dd7b32d7cf0ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa3b6d9a05a35eb193e349e95b1f89d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8454989732716850cb57ca15f8ef596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe8fff55c06f220725f4124e45a1e89.png)
(1)求m的值;
(2)O为坐标原点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f16919951d315ce74a40ebd498da693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(3)在(2)的条件下,设椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bdd0e58df4e70da19634cc7e6fa381b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11b141148d19998c842aee2e5b1de63a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53933a3335904ce1cda71162968e5c8e.png)
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