已知椭圆
,
为椭圆
的右焦点,过点
的直线
交椭圆
于
、
两点.
(1)若直线
垂直于
轴,求椭圆
的弦
的长度;
(2)设点
,当
时,求点
的坐标;
(3)设点
,记
、
的斜率分别为
和
,试探讨
是否为定值?如果是,求出该定值;如果不是,求出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.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/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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f4ec943ad1319d9df9ead145195817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860c4c9419ebfa927b3f3ea14e4f4784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(3)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2ed7f31d0ceb8a8574f3b26e907e87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.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/b69e3f7ddd51215d00661c09cd900d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
22-23高三上·上海徐汇·期中 查看更多[2]
上海市位育中学2023届高三上学期期中数学试题(已下线)重难点03圆锥曲线综合七种问题解题方法-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)
更新时间:2023-02-27 08:06:10
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解答题-问答题
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适中
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【推荐1】在平面直角坐标系xOy中,已知过点
的椭圆C:
的右焦点为F(1,0),过焦点F且与x轴不重合的直线与椭圆C交于A、B两点,点B关于坐标原点的对称点为P,直线PA、PB分别交椭圆C的右准线l于M、N两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/655c60ee-92ba-4afc-ad24-f776397c2f6e.png?resizew=175)
(1)求椭圆C的标准方程;
(2)若点B的坐标为
,试求直线PA的方程;
(3)记M、N两点的纵坐标分别为
、
,试问
是否为定值?若是,请求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de261e9b4defbc0be6440397031a87b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/655c60ee-92ba-4afc-ad24-f776397c2f6e.png?resizew=175)
(1)求椭圆C的标准方程;
(2)若点B的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcce45024c28a0ddcef4ec282b40fb1c.png)
(3)记M、N两点的纵坐标分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a2396c671fb0b83df5cad5d5889449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9070c218a98fd79ec3aa59b4421d89b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbfb05e2ec0eb61fde5339fa2809ad7.png)
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【推荐2】已知椭圆
的离心率为
,直线l:y=x+2与以原点O为圆心,椭圆的短轴长为直径的圆O相切.
(1)求椭圆C的方程;
(2)求椭圆C与直线y=kx(k>0)在第一象限的交点为A.
①设
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fe956b1a657aca9c05d0c758f9e464.png)
,求k的值;
②若A与D关于x的轴对称,求
AOD的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
(1)求椭圆C的方程;
(2)求椭圆C与直线y=kx(k>0)在第一象限的交点为A.
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07682612e7fa19ed99f57c262c4de2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fe956b1a657aca9c05d0c758f9e464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
②若A与D关于x的轴对称,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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【推荐1】已知抛物线P的准线方程为
,椭圆
,抛物线P的焦点是椭圆E的右焦点,直线l过椭圆E的右焦点,斜率为1,且与椭圆E交于
两点,求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8c12038db8c737983f39b91e1e86b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】已知在平面直角坐标系
中,椭圆
的离心率为
,过焦点
的直线
与椭圆交于
两点.
(1)求椭圆
的标准方程;
(2)从下面两个条件中任选其一作为已知,证明另一个成立:
①
;②直线
的斜率
满足:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf5343910f9d9bf80726643a4618ea15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)从下面两个条件中任选其一作为已知,证明另一个成立:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb1521665ee3031a17b71021464be7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4f20e07026256fa17244ef48ea0897.png)
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【推荐1】已知椭圆
:
(
),以椭圆
的短轴为直径的圆
经过椭圆
左右两个焦点,
,
是椭圆
的长轴端点.
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654875083587584/1654928075292672/STEM/00ea4ad7aa9e49668bb1321c6d4f3033.png?resizew=211)
(1)求圆
的方程和椭圆
的离心率
;
(2)设
,
分别是椭圆
和圆
上的动点(
,
位于
轴两侧),且直线
与
轴平行,直线
,
分别与
轴交于点
,
,试判断
与
所在的直线是否互相垂直,若是,请证明你的结论;若不是,也请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a032dd225bdd793172220c494c2054e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654875083587584/1654928075292672/STEM/00ea4ad7aa9e49668bb1321c6d4f3033.png?resizew=211)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
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解题方法
【推荐2】已知椭圆
的离心率为
,且过点
.
(2)求椭圆C的方程;
(2)设
是椭圆C上的两个动点,且横坐标均不为l,若直线
的斜率为
,试判断直线
与
的倾斜角是否互补?并说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480f004c98a0df86a35a48bc973f0472.png)
(2)求椭圆C的方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
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