已知椭圆
和圆
分别是椭圆的左、右两焦点,过
且倾斜角为
的动直线
交椭圆
于
两点,交圆
于
两点(如图所示),当
时,弦
的长为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/6/62e77965-3573-4076-97dc-d2db4ea01831.png?resizew=256)
(1)求圆
和椭圆
的方程
(2)若点
是圆
上一点,求当
成等差数列时,
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42bc2f63cb3f952917abce7be9f9bb5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04bd29abb9955b8c311cd07dd22d9cb3.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54d9ee7c7a938ad83f83d4f0b593d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01961669cd597f61fa48e9853d678bb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/6/62e77965-3573-4076-97dc-d2db4ea01831.png?resizew=256)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc67978e5f2eeac99cf3dd0c97a8b42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a9dabb53dc826019fc8b6ae6d940c5.png)
2016·江西新余·模拟预测 查看更多[4]
2016届江西省新余市一中高三第四次模拟文科数学试卷(已下线)专题16 圆锥曲线焦点弦 微点4 圆锥曲线焦点弦综合问题的解法(已下线)专题16 圆锥曲线焦点弦 微点2 圆锥曲线焦点弦三角形面积(已下线)重难点突破15 圆锥曲线中的圆问题(四大题型)
更新时间:2016-12-03 23:47:40
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知点
及圆
.
(1)求圆心
的坐标及半径
的大小;
(2)设过点
的直线
与圆
交于
两点,当
时,求以线段
为直径的圆
的方程;
(3)设直线
与圆
交于
两点,是否存在实数
,使得过点
的直线
垂直平分弦
?若存在,求出实数
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec3fdb2722c0bcac5303546e87152a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63d9f6b787d8b70ee011e8cedbaef5c.png)
(1)求圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(2)设过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.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/9602114f45bdcb304e02710ae7bc0e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(3)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dfb1a824426561f8d0f3194f2ad150.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451fc6e4248b63e70595f23842f06c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
【推荐2】如图,已知圆心坐标为
的圆
与
轴及直线
分别相切于
、
两点,另一圆
与圆
外切,且与
轴及直线
分别相切于
、
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/e5cf1057-373a-45d7-bbc6-de92815a4ef0.png?resizew=166)
(1)求圆
和圆
的方程;
(2)过点
作直线
的平行线
,求直线
被圆
截得的弦的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b92d2bbeed206ab7e8f3e237e0a8708e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cc81cfaccc00aa4b7139de5a35a102.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cc81cfaccc00aa4b7139de5a35a102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/e5cf1057-373a-45d7-bbc6-de92815a4ef0.png?resizew=166)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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解题方法
【推荐1】已知直线
与椭圆
相交于不同两点.
(1)若
,
,求椭圆
的焦距;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06553b7e77205d053c1981e9c050d579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff41b0435e120094baed2e8e37353ec.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01976af20d1652c65938fdf0d469c669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/935b4035585dfe624ebdd0c758c6ea89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27e62ba44cbfec6823ebc1f0c7457fb.png)
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【推荐2】椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
的焦点坐标为
,且过点
.
(1)求椭圆的方程;
(2)直线
交椭圆于
两点,线段
被直线
平分,且
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434249d6640b0c1a712d215cf8b83d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5439f5ff9bd5deec0f0ef35c6f605b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66042c59ea14ebedcf0305445bf1dde0.png)
(1)求椭圆的方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f15cda658b0859013d45a9c03ef276a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b9931cfb6a0ba33cb6e11e569a8cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解题方法
【推荐1】已知椭圆
的离心率为
,短轴长为
,直线l与椭圆C交于A,B两点.
(1)求椭圆C的标准方程;
(2)若线段
的中点为P,O为坐标原点,当
面积取最大值时,求线段
长度的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(1)求椭圆C的标准方程;
(2)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
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【推荐2】在直角坐标系
中,
,
,C为动点,设
的内切圆分别与边AC,BC,AB相切于P,Q,R,且
,记点C的轨迹为曲线E.
(1)求曲线E的方程;
(2)不过原点O的直线l与曲线E交于M,N,且直线
经过MN的中点T,求
的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9536aab5a1c63ace1d81585b1d3ce97d.png)
(1)求曲线E的方程;
(2)不过原点O的直线l与曲线E交于M,N,且直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38cd2a180ae300bbf2388a709e4c28e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
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【推荐1】定义:设
分别为曲线
和
上的点,把
两点距离的最小值称为曲线
到
的距离.
(1)求曲线
到直线
的距离;
(2)若曲线
到直线
的距离为
,求实数
的值;
(3)求圆
到曲线
的距离.
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/f5e35346493b4d77ae8a450b365bbc83.png)
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/659ffb6472314085abf9c604e7b7cff1.png)
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/0caee73e0c5f479b95cd8169137e73ac.png)
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/f5e35346493b4d77ae8a450b365bbc83.png)
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/659ffb6472314085abf9c604e7b7cff1.png)
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/0caee73e0c5f479b95cd8169137e73ac.png)
(1)求曲线
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/1da924d497f6418f9343c843381969b4.png)
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/32846a2cac4843408fc6563d03aee758.png)
(2)若曲线
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/2cd7e0d20dd5452893ac65418c194db5.png)
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/78efaaa3831e48b19ca0043f25e22d18.png)
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/dfb6e4e52c8d429f8e164c9fe648ec6f.png)
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/c8235d8b4fe645faaa0d0c3ca63ed233.png)
(3)求圆
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/d6c824b2b4744989bdb5b6faa52003b4.png)
![](https://img.xkw.com/dksih/QBM/2013/7/19/1571297481089024/1571297486774272/STEM/4840d8dfdd7e473ebaaf7c0e8882467c.png)
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【推荐2】已知
为坐标原点,点
在圆
:
上.
(1)求实数
的值;
(2)求过圆心
且与直线
平行的直线的方程;
(3)过点
作互相垂直的直线
,
,
与圆
交于
两点,
与圆
交于
两点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0228042e28f9ba663dafe657e677cac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b95e298ba71c7a81195e0eedc79c221.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求过圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe5351a50aac766f146acd1a9a6e79e.png)
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