在平面直角坐标系
中,点
,
分别是椭圆
:
左顶点,右焦点,椭圆
的右准线与
轴相交于点
,已知右焦点
恰为
的中点,且椭圆
的焦距为2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/5b3791f1-1d08-4196-9b3b-36379bfe71a4.png?resizew=180)
(1)求椭圆
的标准方程;
(2)过右焦点
的直线
与椭圆
相交于
,
.记直线
,
的斜率分别为
,
,若
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/5b3791f1-1d08-4196-9b3b-36379bfe71a4.png?resizew=180)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过右焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/e5f56730077a24891460edca8b92e04b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
更新时间:2020-04-25 14:01:18
|
相似题推荐
解答题-问答题
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适中
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名校
【推荐1】已知椭圆C:
的左、右焦点分别为
,短轴的一个端点为
.
(1)若
为直角,焦距为2,求椭圆C的标准方程;
(2)若
为锐角,求椭圆C的离心率的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
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【推荐2】魏晋时期数学家刘徽(图a)为研究球体的体积公式,创造了一个独特的立体图形“牟合方盖”,它由完全相同的四个曲面构成,相对的两个曲面在同一圆柱的侧面上.如图,将两个底面半径为1的圆柱分别从纵横两个方向嵌入棱长为2的正方体时(如图b),两圆柱公共部分形成的几何体(如图c)即得一个“牟合方盖”,图d是该“牟合方盖”的直观图(图中标出的各点
,
,
,
,
,
均在原正方体的表面上).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/b76aa339-7164-4091-a34b-d8688623f5cf.png?resizew=766)
(1)由“牟合方盖”产生的过程可知,图d中的曲线
为一个椭圆,求此椭圆的离心率;
(2)如图c,点
在椭圆弧
上,且三棱锥
的体积为
,求二面角
的正弦值.
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/b76aa339-7164-4091-a34b-d8688623f5cf.png?resizew=766)
(1)由“牟合方盖”产生的过程可知,图d中的曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42d53a48595e6f0be79d75a12938e89.png)
(2)如图c,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96cf01ce6c1bf3a909feaee502aebcc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead4139ed996caf2ab621c53cfde772d.png)
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解答题-证明题
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【推荐1】在以
为圆心,6为半径的圆A内有一点
,点P为圆A上的任意一点,线段BP的垂直平分线
和半径AP交于点M.
(1)判断点M的轨迹是什么曲线,并求其方程;
(2)记点M的轨迹为曲线
,过点B的直线与曲线
交于C、D两点,求
的最大值;
(3)在圆
上的任取一点Q,作曲线
的两条切线,切点分别为E、F,试判断QE与QF是否垂直,并给出证明过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd99c5000629d7f49499d666e68f40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852b303689c31189cd47bb4a3220f9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(1)判断点M的轨迹是什么曲线,并求其方程;
(2)记点M的轨迹为曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7906b66906ec5943b3bbd9ce9a47e7.png)
(3)在圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3bfbb12e78cccbacd71d563985d7158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
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【推荐2】设A
,B
是椭圆
上的两点,
为坐标原点,向量
,向量
.
(1)设
,证明:点M在椭圆上;
(2)若点P、Q为椭圆上两点,且
∥
试问:线段PQ能否被直线OA平分?若能平分,请加以证明;若不能平分,请证明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56720e2f2b0ddd72156da495923698da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2852ae85cfcc804b3192ea8543c88938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d513e18997f3a9e6da9cc6e3a1404546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9329107cc470884aabcb5adf88c498cd.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1184fc29daa16791f741e25fa2a0f18c.png)
(2)若点P、Q为椭圆上两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
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