如图所示,已知点
、
是椭圆
的两个焦点,椭圆
经过点
、
,点
是椭圆
上异于
、
的任意一点,直线
和
与椭圆
的交点分别是
、
和
、
.设
、
的斜率分别为
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/92cc1dca-4d3e-4d8a-bce4-cec810a0963e.png?resizew=189)
(1)求证:
为定值;
(2)求
的最大值.
![](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/5ad5c24ed80bb57cb2ac412b7b0d74b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a6cdea44c4d1e008daee02d080db27e.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/23f3ffe7abc59e2f65d827c8eab8d36a.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/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/92cc1dca-4d3e-4d8a-bce4-cec810a0963e.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe5351a50aac766f146acd1a9a6e79e.png)
16-17高二下·湖北·期中 查看更多[4]
湖北省华中师范大学第一附属中学2016-2017学年高二下学期期中考试数学(文)试题(已下线)综合练习模拟卷02-2021年高考一轮数学单元复习一遍过(新高考地区专用)(已下线)综合练习模拟卷02-2021年高考一轮数学(文)单元复习一遍过(已下线)专题13 解析几何中的范围、最值和探索性问题 第一篇 热点、难点突破篇(练)-2021年高考数学二轮复习讲练测(浙江专用)
更新时间:2021-01-16 16:18:15
|
相似题推荐
【推荐1】已知椭圆
:
.
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/27a655c1d9fb49c48a894cd7756b35f4.png)
(1)椭圆
的短轴端点分别为
(如图),直线
分别与椭圆
交于
两点,其中点
满足
,且
.
①证明直线
与
轴交点的位置与
无关;
②若∆
面积是∆
面积的5倍,求
的值;
(2)若圆
:
.
是过点
的两条互相垂直的直线,其中
交圆
于
、
两点,
交椭圆
于另一点
.求
面积取最大值时直线
的方程.
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/00b91f5bedcb492b9ea4abf8bd4b6d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/27a655c1d9fb49c48a894cd7756b35f4.png)
(1)椭圆
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/00b91f5bedcb492b9ea4abf8bd4b6d1e.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/d8a19473205742e8bf3a9fe295f5e9a2.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/c7616dc943434874affa8a7ba64e007e.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/00b91f5bedcb492b9ea4abf8bd4b6d1e.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/c5e6de7dd37e4118a9b531ebc158bcf5.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/17ee9b02770a474c93c4a38285d299f8.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/f13c327ae94d4e88b69497f00f11d321.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/83aff16e21ca45ab89007a64df9350e6.png)
①证明直线
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/82b95b7b952d489f871b5177a991f131.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/da75bbbd5d544cf6a514b3e5c658210e.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/a33140d627fc48cab669a9f0b903cf1f.png)
②若∆
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/157a6308aba74691b4e982ae48157726.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/6c4f37bcd4334a0e9069a3dafba15e10.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/a33140d627fc48cab669a9f0b903cf1f.png)
(2)若圆
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/b5448d28f8b540a28674fdd9743d0d34.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/1d31cc79a5af41e99e8429c5eab4bcc1.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/e4040a803de84e5dbaf7939111bb53bc.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/c0111b89340d4760a15b02e907b9aa08.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/66c4375962e447c483297d2b96e51efc.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/b5448d28f8b540a28674fdd9743d0d34.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/8a7fc053b596494193d46a918dd5aa5f.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/eaa242ccb0a441dd993b444db2b640a8.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/9cf2d44c064c4d2eb27855f3d8084079.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/00b91f5bedcb492b9ea4abf8bd4b6d1e.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/dac0b8b981d54615b38e66dc986c3d65.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/afef2b908ab64949a81d791a80397d72.png)
![](https://img.xkw.com/dksih/QBM/2014/1/22/1571501315825664/1571501321666560/STEM/66c4375962e447c483297d2b96e51efc.png)
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【推荐2】过椭圆
的焦点
且垂直于长轴的直线交椭圆于
两点,线段
的长度为1.
(1)求椭圆
的方程;
(2)直线
经过定点
,且与椭圆
交于
两点,
为原点,求三角形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26d1b84ffffb01daebfd1a425fc16ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.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/e4819c39c281427826e1b3f7a4c2b720.png)
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解题方法
【推荐1】在平面直角坐标系
中,已知点
,点
的轨迹为
.
(1)求
的方程;
(2)设点
在直线
上,
为
的左右顶点,直线
交
于点
(异于
),直线
交
于点
(异于
),
交
于
,过
作
轴的垂线分别交
、
于
,问是否存在常数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9615802701baa322ca5edf222ebd4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd337aef2bbc74f44733a7402e43792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ebaa32f4f1f4f807ca9aeb7fb29951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20bacddbeebf4148ec9a130d3b65fd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a62712f89c7cadc7bb9939eccc1333c.png)
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解题方法
【推荐2】已知椭圆
:
的右焦点为
,过点
的直线
交椭圆
于
,
两点,连接
,
并延长分别与椭圆交于异于
,
的两点
,
.
(1)求直线
的斜率的取值范围;
(2)若
,
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65368687df4d7e3b9304e85ec4de354c.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0616bf8eded75a979bd1142eba7e6550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46cd1cb56d6546274d2fa2716623d039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adebff9fb726cd58eda1ef994890901.png)
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