1 . 已知点
,
,动点
满足直线
与
的斜率之积为
,记点
的轨迹为曲线
.
(1)求曲线
的方程,并说明
是什么曲线;
(2)过坐标原点的直线交曲线
于
,
两点,点
在第一象限,
轴,垂足为
,连结
并延长交曲线
于点
.
(ⅰ)证明:直线
与
的斜率之积为定值;
(ⅱ)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843e3f8c3314d51a322c6122a13745c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c477662c046daefe58026249658b6d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过坐标原点的直线交曲线
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d3a0273d1f3046dfad2086d0df56c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(ⅰ)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
(ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
您最近一年使用:0次
2023-09-01更新
|
675次组卷
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4卷引用:辽宁省沈阳市东北育才双语学校2023-2024学年高二上学期期中数学试题
辽宁省沈阳市东北育才双语学校2023-2024学年高二上学期期中数学试题内蒙古包头市2023-2024学年高三上学期调研考试理科数学试题(已下线)重难点突破09 一类与斜率和、差、商、积问题的探究(四大题型)(已下线)模型2 圆锥曲线中的斜率模型(高中数学模型大归纳)
名校
解题方法
2 . 如图,在平面直角坐标系中,
分别为双曲线Г:
的左、右焦点,点D为线段
的中点,直线MN过点
且与双曲线右支交于
两点,延长MD、ND,分别与双曲线Г交于P、Q两点.
![](https://img.xkw.com/dksih/QBM/2021/12/16/2873675367243776/2876742357467136/STEM/358abcbb-a95a-4f0c-b8e8-023529854af5.png?resizew=211)
(1)已知点
,求点D到直线MN的距离;
(2)求证:
;
(3)若直线MN、PQ的斜率都存在,且依次设为k1、k2.试判断
是否为定值,如果是,请求出
的值;如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5848e50805496263d52dcbde9671a89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438b087a3b66f48298b5a944629adb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7d5b7a335fb30a034976287aee9e05.png)
![](https://img.xkw.com/dksih/QBM/2021/12/16/2873675367243776/2876742357467136/STEM/358abcbb-a95a-4f0c-b8e8-023529854af5.png?resizew=211)
(1)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5261c3908257dfc70e84ae8126163e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eab0357b5e80a6fa5b1c51a2f01be14.png)
(3)若直线MN、PQ的斜率都存在,且依次设为k1、k2.试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a3f348a942d468f0d77c0dfbb41d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a3f348a942d468f0d77c0dfbb41d87.png)
您最近一年使用:0次
2021-12-20更新
|
1280次组卷
|
5卷引用:上海市向明中学2022-2023学年高二下学期期中数学试题
上海市向明中学2022-2023学年高二下学期期中数学试题上海市闵行区2022届高三上学期一模数学试题(已下线)重难点05 解析几何-2022年高考数学【热点·重点·难点】专练(新高考专用)(已下线)押全国卷(理科)第20题 圆锥曲线-备战2022年高考数学(理)临考题号押题(全国卷)(已下线)专题19 圆锥曲线 (模拟练)-2
名校
3 . 设
是定义在
上的函数,且
,对任意
,
,若经过点
、
的直线与
轴的交点是
,则称
为
、
关于函数
的平均数,记为
.
(1)若
,求
的表达式;
(2)若
,求出所有满足条件的
的解析式;
(3)若对任意
,
,且
,都有
成立,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fed3c00731e2b8cb28168839363e48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb16534dcb01977caa20f738f43158a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7615495e833d173a8845b19405ba3a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c248c15da679e72278636cb731b7230a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c0668061426d6a0e63006d263c7815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c248c15da679e72278636cb731b7230a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4028849df8ded22fa2a5c2aead15a9c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79657921c225d5a6a7d124ebfdf11d0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af175d95e0acabd3cbd027b7192aee5d.png)
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