已知椭圆
的右焦点为
,点
在椭圆
上.
(1)求椭圆
的方程;
(2)过点
且斜率大于
的直线
与椭圆
相交于不同的两点
和
,直线
、
分别交
轴于
、
两点,记
、
的面积分别为
、
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6b94e42869013745050aba059b58dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d0ad17b2a31609477615424d2c58ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5516da98949f4528c7399e4274c34482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b6c9d7a8561a43bad7fb09c0ddc4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.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/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/7dc2a47750d93b4faed6d66cea09f671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a466898fbc4d2f5d89cdddd0feabb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7caffa285fbdbb51a0373b3654486c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6801133970b88d5b8340bc59f79fec0.png)
更新时间:2021-01-23 16:20:48
|
相似题推荐
解答题-问答题
|
困难
(0.15)
解题方法
【推荐1】已知点
为椭圆C的右焦点,P为椭圆上一点,且
(O为坐标原点),
.
(1)求椭圆C的标准方程;
(2)经过点
的直线l与椭圆C交于A,B两点,求弦
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15fc8481e350e6f3efd14d618b30d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6196f68aa254e0bc1061551d47bb934c.png)
(1)求椭圆C的标准方程;
(2)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】已知椭圆
(
)的左、右焦点分别为
、
,点![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/3cc290616f6f4942ac59da6640358fde.png?resizew=16)
,过点
且与
垂直的直线交
轴负半轴于点
,且
.
(1)求证:△
是等边三角形;
(2)若过
、
、
三点的圆恰好与直线
:
相切,求椭圆
的方程;
(3)设过(2)中椭圆
的右焦点
且不与坐标轴垂直的直线
与
交于
、
两点,
是点
关于
轴的对称点.在
轴上是否存在一个定点
,使得
、
、
三点共线,若存在,求出点
的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/a4885230d6c64c71a13826aed84bcc30.png?resizew=99)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/90d4ef9e16f641deb2a2782a99a5c854.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/989529bbf9c940e18fe5523ae8f25a50.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/c94552212a274a5094fa8d0efda0306b.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/3cc290616f6f4942ac59da6640358fde.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/0ea4527f5d3b42d0956dd13c5fbfffc9.png?resizew=43)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/3cc290616f6f4942ac59da6640358fde.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/dfa755297bd44c8092ac135f648db551.png?resizew=29)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/6732036432a547f5b1b58e92176d8e9d.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/1f4dbca7ecba4c919440f19c728db468.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/c30908dc1fbe4192b058abfa0673fc5f.png?resizew=109)
(1)求证:△
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/ae93578723f24a0b9059d57d5cc60e8c.png?resizew=41)
(2)若过
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/3cc290616f6f4942ac59da6640358fde.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/1f4dbca7ecba4c919440f19c728db468.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/c94552212a274a5094fa8d0efda0306b.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/cba65ef8b6024d398ceab07fb83bb342.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/3de06a8c064c487cb2096b2aba439344.png?resizew=101)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/976bd0f2091a470bb3059df6211f87f5.png?resizew=16)
(3)设过(2)中椭圆
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/976bd0f2091a470bb3059df6211f87f5.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/c94552212a274a5094fa8d0efda0306b.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/cba65ef8b6024d398ceab07fb83bb342.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/976bd0f2091a470bb3059df6211f87f5.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/c5738965810e49a68b0bf33605d311f6.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/443824ad89914928886d3d2cada25db4.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/e1f42eedf951449da2f947d01522f8be.png?resizew=21)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/c5738965810e49a68b0bf33605d311f6.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/6732036432a547f5b1b58e92176d8e9d.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/6732036432a547f5b1b58e92176d8e9d.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/29b12f61755a4c7299b9016e553aacd2.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/e1f42eedf951449da2f947d01522f8be.png?resizew=21)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/443824ad89914928886d3d2cada25db4.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/29b12f61755a4c7299b9016e553aacd2.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339532800/STEM/29b12f61755a4c7299b9016e553aacd2.png?resizew=19)
您最近一年使用:0次
【推荐1】已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
,
是坐标原点,
分别为其左右焦点,
,
是椭圆上一点,
的最大值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44917f942c3fd36614f58d47b5fe1821.png)
(1)求椭圆
的方程;
(2)若直线
与椭圆
交于
两点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7df99fe6438442a9453fc0c57fb703.png)
(i)求证:
为定值;
(ii)求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.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/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efbe4a54a27dc48e3f52d6249bd1681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22a3c7e465a61e9849dd223261be47c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44917f942c3fd36614f58d47b5fe1821.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7df99fe6438442a9453fc0c57fb703.png)
(i)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3eeae1143162b4d564f4b77e3f77cd8.png)
(ii)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
解题方法
【推荐2】已知椭圆
:
的短半轴长为1,焦距为
.
(1)求椭圆E的方程;
(2)设椭圆E的右顶点为A,过点P (4,0)且斜率为
的直线交椭圆E于不同的两点B,C,直线AB,AC分别与直线
交于点M,N. 求|PM|+|PN|的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb57575dea540c569265de158429425.png)
(1)求椭圆E的方程;
(2)设椭圆E的右顶点为A,过点P (4,0)且斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e808df9b7790498306544b1de50f3e75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef79861421b414b455a090a3ef04fef.png)
您最近一年使用:0次