已知椭圆
的左右焦点为
为其上顶点,
正三角形
(1)求椭圆
的离心率;
(2)若直线
与椭圆
交于
两点,
为坐标原点,直线
的斜率之积等于
的面积是
,求椭圆
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ed463bf16c78a4bbb9d3acff922afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.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/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e203b7c9a6600e0272c58a23733490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9338345ee6c8206a1368883bf079b530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f41d152fa5e747231e4a3a8e42a2d9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
更新时间:2023-01-12 19:52:19
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,设椭圆
的左右焦点为
,上顶点为
,点
关于
对称,且![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/cfa2b78c37264572bf355a174ef56982.png)
![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/2835c3fe1c144f5c8d5c9ece655a1a80.png)
(1)求椭圆
的离心率;
(2)已知
是过
三点的圆上的点,若
的面积为
,求点
到直线
距离的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e2f2d391b1e6304eb2bba560d0ccdd.png)
![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/9e504aae2c504fcc9cba6e19886d4a82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/e34f2d0b8a89496d9f7956584dc3e56c.png)
![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/8cbe226b317c4047be9cda9f456e9295.png)
![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/cfa2b78c37264572bf355a174ef56982.png)
![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/2835c3fe1c144f5c8d5c9ece655a1a80.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/75ef1bfe50d34f4eb03e3d417ad3d444.png)
![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/155d1b9b9447423a8ad67ef2a1d31e37.png)
![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/299ab4d1344e44be9b557de2bc402346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2014/10/20/1571880411676672/1571880417378304/STEM/19e18c8ce667455599598210c749a88a.png)
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解答题
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【推荐2】已知命题
:方程
表示焦点在
轴上的椭圆;命题
:实数
使得不等式
成立.
(1)若命题
中的椭圆的离心率为
,求实数
的值;
(2)命题
是命题
的什么条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c067c602de3cdd42e1ff5c5dbc76e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29c2c83cc7d112c6882a3dd11172627.png)
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】已知椭圆
:
的左、右顶点分别为
,
,下顶点为
,点
到直线
的距离为
,且椭圆
过点
.
(1)求椭圆
的标准方程;
(2)设
,
,
为椭圆
上不同的三点,且
,
关于原点
对称,原点
到直线
的距离等于
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4c60a39479f30736dde0c6085833b3.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5929048ce5167abc4750589f2e21841.png)
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解题方法
【推荐2】在平面直角坐标系xOy中,已知点
,点M的轨迹为C.
(1)求C的方程;
(2)是否存在过点
的直线l与曲线C交于不同的两点A、B﹐满足
.若存在,求直线l的方程;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/205b264138de578cc893d8cb87706118.png)
(1)求C的方程;
(2)是否存在过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6878eee8135368a0912d917eb051fa63.png)
您最近一年使用:0次
解答题-问答题
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真题
【推荐1】直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
与椭圆
相交于
,
两点,
为坐标原点.
(Ⅰ)当点
的坐标为
,且四边形
为菱形时,求
的长;
(Ⅱ)当点
在
上且不是
的顶点时,证明:四边形
不可能为菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2f221c06f2f0c96bdb9a2c754e90c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27e4397b76638266f40e7b589b46d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(Ⅰ)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(Ⅱ)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
您最近一年使用:0次
解答题
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解题方法
【推荐2】已知椭圆
:
经过
,且椭圆
的离心率为
.
(1)求椭圆
的方程;
(2)设斜率存在的直线
与椭圆
交于
两点,
为坐标原点,
,且
与圆心为
的定圆
相切.直线
:
(
)与圆
交于
两点,
.求
面积的最大值.
![](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/0d26f643f896eda71a2485bd8e41de95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设斜率存在的直线
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7df99fe6438442a9453fc0c57fb703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354f8e9d6cca157b95877d6540d16fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d67d534b258dc1774320f6138f486a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b2400d72b1e3145cb21ba719d8a968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f3409c480b1c585ddae764c1a11c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b109572ae8a777a4e8bd92789140f8c.png)
您最近一年使用:0次
【推荐1】已知椭圆C:
的左、右焦点分别为
是C上一点,
.点
分别为C的上、下顶点,直线
:
与C相交于
两点,直线
交于点P.
(1)求C的标准方程;
(2)证明点Р在定直线
上,并求直线
,
围成的三角形面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88329e084c93a553bc1850b038757c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4001f73c51c9f2a157138a9491fc124e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d468be20b4d43f5de75416de20e8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841c1990adfb5b328b46b9f79af5bb40.png)
(1)求C的标准方程;
(2)证明点Р在定直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13971195289c281746a716b5341fb137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
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解答题-证明题
|
适中
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名校
解题方法
【推荐2】动点M与定点
的距离和M到定直线
的距离之比是常数
.
(1)求动点M的轨迹G的方程;
(2)设O为原点,点
,过点A的直线l与M的轨迹G交于P、Q两点,且直线l与x轴不重合,直线
分别与y轴交于R、S两点,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3680f7d0d96efc5b207c8e9552e21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(1)求动点M的轨迹G的方程;
(2)设O为原点,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8314b1fdf7dcef270ac0a2567609242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1aaf5c27cab84ebf216ac14252083e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37aa696544881fcd3fe2d57106f51573.png)
您最近一年使用:0次