名校
1 . 如图所示,椭圆
:
(
)的离心率为
,左焦点为
,右焦点为
,短轴两个端点
、
,与
轴不垂直的直线
与椭圆
交于不同的两点
、
,记直线
、
的斜率分别为
、
,且
.
![](https://img.xkw.com/dksih/QBM/2018/1/10/1857172837933056/1858347921252352/STEM/b2fcfb40958b4717b8d7b89b2f2dcdef.png?resizew=156)
(1)求椭圆
的方程;
(2)求证直线
与
轴相交于定点,并求出定点坐标;
(3)当弦
的中点
落在
内(包括边界)时,求直线
的斜率的取值.
![](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/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b58716499ed988f860f08296e9ec67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdde36b4b2592015f9f69cd8a59841c6.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/81dea63b8ce3e51adf66cf7b9982a248.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5320135f43c7a4be29c2908b7a9638d4.png)
![](https://img.xkw.com/dksih/QBM/2018/1/10/1857172837933056/1858347921252352/STEM/b2fcfb40958b4717b8d7b89b2f2dcdef.png?resizew=156)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求证直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)当弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42fc33bcfc63ec2f4940ccd3f862400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2 . 已知椭圆
的中心在坐标原点,右焦点为
,
、
是椭圆
的左、右顶点,
是椭圆
上异于
、
的动点,且
面积的最大值为
.
(1)求椭圆
的方程;
(2)是否存在一定点
(
),使得当过点
的直线
与曲线
相交于
,
两点时,
为定值?若存在,求出定点和定值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/9c57be7ae11b9ff11c09d38631738d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)是否存在一定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cc385abc58e7a16d3c239c23788a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b9a984ca1204d26c121e986aa791ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a57a76df20fac15dcd8b54523f4a25.png)
您最近一年使用:0次
3 . 在平面直角坐标系中,已知椭圆
,设
是椭圆
上任一点,从原点
向圆
作两条切线,切点分别为
.
(1)若直线
互相垂直,且点
在第一象限内,求点
的坐标;
(2)若直线
的斜率都存在,并记为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd60600846df3d2901a2be194f64c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3feccf154671abf1114e77c8cb03c83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/313f69242ff392b3948fda5c9800a8cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139c0ae68e597571ba72ef727fa9222c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139c0ae68e597571ba72ef727fa9222c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1511fecc764a34504b104a69562aa51.png)
您最近一年使用:0次
2016-12-04更新
|
481次组卷
|
4卷引用:2016届江西省上高二中高三全真模拟理科数学试卷
11-12高三·浙江·阶段练习
4 . 如图,分别过椭圆
:
左右焦点
、
的动直线
相交于
点,与椭圆
分别交于
不同四点,直线
的斜率
、
、
、
满足
.已知当
轴重合时,
,
.
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/95ffaaeae50d4824b63489a20fdb3d84.png)
(1)求椭圆
的方程;
(2)是否存在定点
,使得
为定值.若存在,求出
点坐标并求出此定值,若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/5fb220a615f8429da491f8fb193a8cf4.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/11b5aa7350d94e1d91aa9c90d0f71d55.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/7806f94cdef94e3f9bb46eb995179756.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/3fca0151c3974839aa5e333663ed8a4b.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/427393ceb6564704a245ace9a8b40e9a.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/2ca48b5fac254b9082b4d9fe9cdc5852.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/36b2f22b22754e07aaaadfb1b2948dda.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/c36c77c30d274daaa6bb9ccea09f4bca.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/1eafd630744542448bcbb64e75d7a12f.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/04fe61263ec649f3b8aa56fe22a50b18.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/08dee80a5fd74d1ca8e078ea529cea03.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/8c20388e7fcf47b3ae63ce124561015c.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/a744aada74624d7693a8781dce4bc95f.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/d0008db370ec47e5bf5a09c3dedff2e4.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/7511ec7ff11843648448db3528b3e337.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/769c7e12493e41a594ded3ab1bf035bc.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/42d1dc28aefe466aa76fbfdb0611fb38.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/95ffaaeae50d4824b63489a20fdb3d84.png)
(1)求椭圆
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/560388ede6554d41b31af0edd686989e.png)
(2)是否存在定点
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/6ff2d1d3d2044af6a371124fb4e5b82d.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/7b7cd5644bb945459b1a12b05bbf7917.png)
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571914647093248/1571914652934144/STEM/cafe5efba5bb42a3bddf164611ec7cf6.png)
您最近一年使用:0次
13-14高三·河南郑州·期末
5 . 已知椭圆
的离心率为
,且过点
.
![](https://img.xkw.com/dksih/QBM/2014/10/29/1571887049424896/1571887055314944/STEM/65d9ebcab14e4c478e1d089dfb348285.png?resizew=267)
(1)求椭圆的标准方程;
(2)四边形
的顶点在椭圆上,且对角线
、
过原点
,若
,
①求
的最值;
②求证:四边形
的面积为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e501efaf72113fc8ee3d495004fa980.png)
![](https://img.xkw.com/dksih/QBM/2014/10/29/1571887049424896/1571887055314944/STEM/65d9ebcab14e4c478e1d089dfb348285.png?resizew=267)
(1)求椭圆的标准方程;
(2)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857d0d2010f31e9327d640bf0ee37e8f.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ace585d3cc2e113a0927cdf9e56756a.png)
②求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2016-12-03更新
|
1050次组卷
|
3卷引用:2014-2015学年江西省赣州市赣县中学北校高二1月月考理科数学试卷
2014-2015学年江西省赣州市赣县中学北校高二1月月考理科数学试卷2014-2015学年江西省赣州市赣县中学北校高二1月月考文科数学试卷(已下线)2014届河南省中原名校高三高考仿真模拟统一考试理科数学试卷
2012·福建龙岩·一模
6 . 以椭圆
:
的中心
为圆心,
为半径的圆称为该椭圆的“准圆”.设椭圆
的左顶点为
,左焦点为
,上顶点为
,且满足
,
.
(1)求椭圆
及其“准圆”的方程;
(2)若椭圆
的“准圆”的一条弦
(不与坐标轴垂直)与椭圆
交于
、
两点,试证明:当
时,试问弦
的长是否为定值,若是,求出该定值;若不是,请说明理由.
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/e94a837b8c9c449bbe0cdcde9a66d210.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/dc94d4377ce745799fee878dbbefd0f0.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/a665cfba064e40e6a66783f5d694a344.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/e4a162a17b81429fb812fd36de2d86c3.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/7c8e6aba340b4557afec35dd8271c2f5.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/47f2f923ef224082a8d04f73cae96b10.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/c581f24a8e514b4baf35d6959b5cf3d8.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/e1f4d8d2798d4f16acd5485c49b5456f.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/92ae6925733d484b87aab7e904af721a.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/3fc38808db444ca9a37b0d4119a30951.png)
(1)求椭圆
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/bcb3a0f4b06b4759aad40ef3dd79b943.png)
(2)若椭圆
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/7c8e6aba340b4557afec35dd8271c2f5.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/34fa18c9a9ec4e8da42abf0f046e019a.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/7c8e6aba340b4557afec35dd8271c2f5.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/34dc71127bb04f53be4793d64157d396.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/5b8f75b8901a49e29926354999b18d32.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/881fbd1ce77f4593bf13d2d7d76bad37.png)
![](https://img.xkw.com/dksih/QBM/2016/9/26/1573040779763712/1573040785285120/STEM/728e7f242e254ee89546e8c1169f42fb.png)
您最近一年使用:0次
2016-12-01更新
|
876次组卷
|
3卷引用:2015-2016学年江西省于都三中高二第三次月考理科数学试卷
14-15高二上·山东东营·期末
解题方法
7 . 已知椭圆
:
的离心率为
,右焦点为
.
(1)求椭圆
的方程;
(2)若过原点
作两条互相垂直的射线,与椭圆
交于
两点,求证:点
到直线
的距离为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f42d6c12d8b5309e81979bf1f045dc.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若过原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解题方法
8 . 已知椭圆
与直线
:
交于不同的两点
,原点到该直线的距离为
,且椭圆的离心率为
.
(1)求椭圆的方程;
(2)是否存在实数
使直线
交椭圆于
两点,以
为直径的圆过点
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf1b29bc6c418d91c0c34d0a663897fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
(1)求椭圆的方程;
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ebce8b2a915356ed39f36c5bad2ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b09e2d46f94b9ca3caf3f8283619c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ee8669bc280bff4b20644cb82faf23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
9 . 线段
是椭圆
过
的一动弦,且直线
与直线
交于点
,则__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c9dcfd9f4c5298035870cb88a34169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
2016-12-01更新
|
1073次组卷
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3卷引用:2015-2016学年江西南昌二中高二上学期期中理科数学试卷
2015-2016学年江西南昌二中高二上学期期中理科数学试卷2015-2016学年江西南昌二中高二上学期期中文科数学试卷(已下线)2011—2012学年度黑龙江大庆实验中学高二上学期期末考试理科数学试卷