1 . 已知动点P到直线
的距离是P到点
距离的2倍,点P的轨迹记为C.
(1)证明:存在点
,使得
为定值.
(2)过点F且斜率
的直线l与C交于A,B两点,M,N为x轴上的两个动点,且
,
,若
,求k.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
(1)证明:存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ed50b7ddc736c4a2fad6a58135e03f.png)
(2)过点F且斜率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d99e9ab44437147165c319705daad0fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339f691f01e9fb0e30570d5daad31002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0dc4ea85e09c94960e4f1c20657e117.png)
您最近一年使用:0次
2023-01-09更新
|
413次组卷
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4卷引用:云南省部分学校2023届高三上学期12月联考数学试题
名校
解题方法
2 . 已知椭圆
的长轴长是短轴长的2倍,焦距是
.
(1)求椭圆C的方程;
(2)若直线l:
与椭圆C交于两个不同点D,E,以线段
为直径的圆经过原点,求实数
的值;
(3)设A,B为椭圆C的左、右顶点,
为椭圆C上除A,B外任意一点,线段
的垂直平分线分别交直线
和直线
于点P和点Q,分别过点P和Q作
轴的垂线,垂足分别为M和N,求证:线段MN的长为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(1)求椭圆C的方程;
(2)若直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67e4b79aaab10cccde470d408ec9f0f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)设A,B为椭圆C的左、右顶点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2022-04-14更新
|
447次组卷
|
5卷引用:四川省内江市威远中学校2021-2022学年高二下学期第一次月考数学(理)试题
3 . 已知椭圆具有如下光学性质:从椭圆的一个焦点发出的光线射向椭圆上任一点,经椭圆反射后必经过另一个焦点.若从椭圆
的左焦点
发出的光线,经过两次反射之后回到点
,光线经过的路程为8,T的离心率为
.
(1)求椭圆T的标准方程;
(2)设
,且
,过点D的直线l与椭圆T交于不同的两点M,N,
是T的右焦点,且
与
互补,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004d3c8fff0581f4651ce992ef080de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆T的标准方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d209a493826a4416a2e839b3b79549cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a59d2738345079ced7cc9ce2120f588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e85d6725758e31a8f52a731625d12b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6aa459fb005aec948ca209e898c354f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5585a42c8f07ad90b94ace9db3d78994.png)
您最近一年使用:0次
2022-03-05更新
|
2426次组卷
|
5卷引用:湖南省长沙市雅礼中学2023届高三下学期月考(八)数学试题
湖南省长沙市雅礼中学2023届高三下学期月考(八)数学试题2022年高三数学新高考测评卷(猜题卷八)(已下线)专题29 圆锥曲线中的最值、范围问题- 2022届高考数学一模试题分类汇编(新高考卷)(已下线)专题25 圆锥曲线的光学性质及其应用 微点1 椭圆的光学性质及其应用湖南省岳阳市平江县第一中学2023届高三下学期适应性考试(二)数学试题
4 . 木工是家居装修中重要的角色,经过他们灵巧的双手,一件件堪称艺术品的木制家具被巧妙的制作出来,如图所示就是一种木工制图工具,
是直滑槽
的中点,短杆
可绕
转动,长杆
通过
处铰链与
连接,
上的栓子
可沿滑槽
滑动,且
,
.当栓子
在滑槽
内往复运动一次时,带动
绕
转动一周(
不动时
也不动),
处的笔尖画出的曲线记为
.
![](https://img.xkw.com/dksih/QBM/2021/7/20/2768334835032064/2792428161998848/STEM/ad47ec60-8cbe-4245-89cd-c9007ef9f75a.png?resizew=520)
(1)判断曲线
的形状,并说明理由;
(2)动点
在曲线
外,且点
到曲线
的两条切线相互垂直,求证:点
在定圆上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54298f581688081d0b0214334a0dedf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ef478c804c71ad3b374196a8ca9d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2021/7/20/2768334835032064/2792428161998848/STEM/ad47ec60-8cbe-4245-89cd-c9007ef9f75a.png?resizew=520)
(1)判断曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2021-08-23更新
|
711次组卷
|
2卷引用:江苏省常州市前黄高级中学2021届高三下学期学情检测(三)数学试题
名校
解题方法
5 . 如图,椭圆
的右焦点为F,过F任意作两条互相垂直的直线
,
分别交椭圆
于A,B两点和C,D两点,M,N分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/12/2719514873290752/2771118036082688/STEM/e63ae1d5-e4c8-4139-ae8e-d609d51f4517.png?resizew=297)
(1)若直线
斜率为
,其中O为坐标原点,求直线
的斜率;
(2)记F到直线
的距离为d,求d的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e759f106cb7761ca3128802223a77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/5/12/2719514873290752/2771118036082688/STEM/e63ae1d5-e4c8-4139-ae8e-d609d51f4517.png?resizew=297)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
(2)记F到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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