名校
1 . 画法几何的创始人——法国数学家蒙日发现:在椭圆
:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
中,任意两条互相垂直的切线的交点都在同一个圆上,它的圆心是椭圆的中心,半径等于长、短半轴平方和的算术平方根,这个圆就称为椭圆
的蒙日圆,其圆方程为
.已知椭圆
的离心率为
,点
均在椭圆
上,直线
:
,则下列描述正确的为( )
![](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/3f82eb4ba631d0f50d848aa6e576b379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833bf16f0161259e9d973dbdd5c6b18c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968896e5a0785ec60382a3cb3cfcf260.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b41ec44a7551e6561e27381313be50c.png)
A.点![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-11-22更新
|
532次组卷
|
2卷引用:浙江省A9协作体2023-2024学年高二上学期期中联考数学试题
解题方法
2 . 已知椭圆
,离心率为
,右焦点为
,抛物线
的焦点
到其准线的距离为1.
(1)求
的标准方程;
(2)若过
作斜率为
的直线交椭圆
于
,交
轴于
的中垂线交
轴于
,记以弦
为直径的圆
的面积为
的面积为
,求
.
(3)已知
且
,若斜率为
的直线与椭圆
相交于
两点,且
中点
恰在抛物线
上.记
的横坐标为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd486b8796b3454eab219c28ed131683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e275781f32aab921e98996d1abc0a464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
(2)若过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0017a2e5f9e3d34edb75deddc570f4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b441ed4dff87bad469619581eedce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5d226450493c2710775806fb9e2363.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a11b8baa52b0907ec8638530f1a388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c7a78a662576f9fd20b2568f44ca165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
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解题方法
3 . 法国数学家加斯帕尔·蒙日被誉为画法几何之父.他在研究椭圆切线问题时发现了一个有趣的重要结论:一椭圆的任两条互相垂直的切线交点的轨迹是一个圆,尊称为蒙日圆,且蒙日圆的圆心是该椭圆的中心,半径为该椭圆的长半轴与短半轴平方和的算术平方根.已知在椭圆
中,离心率
,左、右焦点分别是
、
,上顶点为Q,且
,O为坐标原点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/96a72500-b660-4939-ac97-3e0506c1e79d.png?resizew=215)
(1)求椭圆C的方程,并请直接写出椭圆C的蒙日圆的方程;
(2)设P是椭圆C外一动点(不在坐标轴上),过P作椭圆C的两条切线,过P作x轴的垂线,垂足H,若两切线斜率都存在且斜率之积为
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c7316976a221c051a2c14df80b1347.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/8180a6fc0cc7f491751b27f75d338457.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/96a72500-b660-4939-ac97-3e0506c1e79d.png?resizew=215)
(1)求椭圆C的方程,并请直接写出椭圆C的蒙日圆的方程;
(2)设P是椭圆C外一动点(不在坐标轴上),过P作椭圆C的两条切线,过P作x轴的垂线,垂足H,若两切线斜率都存在且斜率之积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df9babb5b5ef3f30621833d88ab6e0d1.png)
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名校
4 . 如图,已知椭圆
和双曲线
具有相同的焦点
,
,A、B、C、D是它们的公共点,且都在圆
上,直线AB与x轴交于点P,直线CP与双曲线
交于点Q,记直线AC、AQ的斜率分别为
、
,若椭圆
的离心率为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5076829e649b3f3866d4a7e07a5713e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697c20fca284394bf5d5b9e5f6d952e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26edd7d076460e7aa7e8f319cb2be370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.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/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83303d3784492506fc44f2b4d6b07bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
A.2 | B.![]() | C.3 | D.4 |
您最近一年使用:0次
2023-02-13更新
|
1858次组卷
|
3卷引用:浙江省金华十校2022-2023学年高三下学期4月模拟考试预演数学试题
21-22高二上·浙江·期末
名校
解题方法
5 . 如图,已知抛物线
,椭圆
:中心在原点,焦点在y轴上,且离心率为
.直线
交
于A、B两点,交
于M、N两点.
是
上的点,且始终位于直线l的右上方.连接
、
,
的平分线交y轴于H,交
的左侧部分于T.
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710480269828096/2710520303804416/STEM/18ff74aa68284d80b779362a4c1110a8.png?resizew=231)
(1)求证:
轴;
(2)若M是
的中点,
是否存在最大值?若存在,求出使
取得最大值时m的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19cf08f835978859030ed7aceabafc27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b631f0160d1e977e798bac3440d2d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a75680a9e16ed607cdea14b4b367fd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.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/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710480269828096/2710520303804416/STEM/18ff74aa68284d80b779362a4c1110a8.png?resizew=231)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5a06e64be51ec0ea71356b000a9b.png)
(2)若M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4638ad26fd816ec06abd5eb1c455e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4638ad26fd816ec06abd5eb1c455e6.png)
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