解题方法
1 . 曲线的曲率是描述几何弯曲程度的量,曲率越大,曲线的弯曲程度越大.曲线在点M处的曲率
(其中
表示函数
在点M处的导数,
表示导函数
在点M处的导数).在曲线
上点M处的法线(过该点且垂直于该点处的切线的直线为曲线在此处的法线)指向曲线凹的一侧上取一点D,使得
,则称以D为圆心,以
为半径的圆为曲线在M处的曲率圆,因为此曲率圆与曲线弧度密切程度非常好,且再没有圆能介于此圆与曲线之间而与曲线相切,所以又称此圆为曲线在此处的密切圆.
在点
处的曲率,并在曲线
的图象上找一个点E,使曲线
在点E处的曲率与曲线
在点
处的曲率相同;
(2)若要在曲线
上支凹侧放置圆
使其能在
处与曲线
相切且半径最大,求圆
的方程;
(3)在(2)的条件下,在圆
上任取一点P,曲线
上任取关于原点对称的两点A,B,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1992f681163b2b8d1fe2df9280225f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc2b6c6aec8cfad1ce0277d6db9759c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67466ba0dcffc70b783b0e1030f4d049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171102a883b22fe6ca578efc8926f5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb734664b496f232b86d053650bb85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc58793b423b62b234768d0cb8be55e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309092c6a1d81679c24dc598af8d6567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc58793b423b62b234768d0cb8be55e4.png)
(2)若要在曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb734664b496f232b86d053650bb85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab94459e87c666facddbe1a23ae1899d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc58793b423b62b234768d0cb8be55e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab94459e87c666facddbe1a23ae1899d.png)
(3)在(2)的条件下,在圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab94459e87c666facddbe1a23ae1899d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59880e470359d8e9faf6ae5ce155cf2a.png)
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2024-05-14更新
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2卷引用:甘肃省2024届高三下学期4月月考数学试卷
2 . 已知双曲线
与曲线
有4个交点
(按逆时针排列)
(1)当
时,判断四边形
的形状;
(2)设
为坐标原点,证明:
为定值;
(3)求四边形
面积的最大值.
附:若方程
有4个实根
,
,
,
,则
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da601fb83011f1f6bf8a60b1d3a6a6cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731809d4e06dfcdb73811b99da26f00e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c43f86ecb6bb6dfb3331b26d957d59d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5325019987094e4b36570319fdf1a9.png)
(3)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
附:若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bdf06ae0fe7b5de03c3d1d68270fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec413484532aa969f9cfa4b90adc004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b271fb5eff2dcde48ea2a9a7c580f621.png)
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3 . 已知点
与点
,
是动点,且直线
与
的斜率之积等于![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
(1)求动点
的轨迹方程;
(2)点
为原点,当
时,求第二象限点
的坐标
![](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/dad2a36927223bd70f426ba06aea4b45.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/8b2a698891d42c70b597f0da4f215f09.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8031c9cfbea709cf7dc7d2fbfcb57253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2023-12-08更新
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559次组卷
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3卷引用:云南省保山市腾冲市第八中学2022-2023学年高二下学期期中考试数学试卷
云南省保山市腾冲市第八中学2022-2023学年高二下学期期中考试数学试卷安徽省芜湖市芜湖一中2023-2024学年高二上学期12月教学质量诊断测试数学试题(已下线)3.2.1 双曲线及其标准方程【第二练】“上好三节课,做好三套题“高中数学素养晋级之路
4 . 已知曲线
的方程是
,曲线
的方程是
,判断
与
是否有交点,如果有,求出交点坐标;如果没有,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356cde48b29ec3cf7b8675539bb3abb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027e61816281621d3727ad01de994707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
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5 . 求证:椭圆
与椭圆
的四个交点共圆.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6533a2123bcaa8c7dcd36d5e3f37700f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcfe5374dd26ea48089dd73dfa669ae1.png)
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名校
6 . 已知双曲线的焦点为
,且渐近线方程为
.
(1)求双曲线的标准方程;
(2)在双曲线上找一点
,满足
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c446e857bc1539e1a2e234587a03c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82352024b31fa23f4ecba5bd8cbb41de.png)
(1)求双曲线的标准方程;
(2)在双曲线上找一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3511cdc6a9b56bc1d9415d3d94ef0f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b490e09248ea3242ec67afae8d00c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f9185c7d48b015d9cd0525616b31.png)
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2023-11-17更新
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644次组卷
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3卷引用:江苏省连云港市四校(新浦中学、海滨中学、锦屏高级中学、开发区高级中学)2022-2023学年高二上学期期中联考数学试题
7 . 在直角坐标系
中,曲线
的参数方程为
(
为参数),以坐标原点
为极点,
轴的正半轴为极轴建立极坐标系,直线
的极坐标方程为
.
(1)求曲线
和
的直角坐标方程;
(2)已知直线
与曲线
恰有一个交点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25cc7470a629c9744a17b1af5b8e98d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dded5997d2191371d403a01fe85042a1.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)已知直线
![](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/f0a532e15e232cb4b99a8d4d07c89575.png)
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2023-05-17更新
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561次组卷
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3卷引用:江西省新八校2023届高三第二次联考数学(理)试题
8 . 已知双曲线C:
定义:把双曲线
的虚轴保持不变,渐近线的斜率变为原来渐近线斜率的两倍得到的曲线称为曲线
的“
线”,把双曲线
的左支向右平移
个单位,把它的右支向左平移
个单位得到的曲线称为曲线
的“
-线”,若双曲线
是等轴双曲线,且焦距等于
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/7/4c91a0eb-1442-46fa-bc3a-7a4cce048598.png?resizew=190)
(1)求双曲线
的“
-线”和“
-线”;
(2)若由“
-线”和“
-线”围成的封闭曲线上的点集都在圆
内或圆
上,求半径最小时圆
的方程,并在坐标系中用尺规作图画出该封闭曲线和圆
大致图像.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ec7fa23be9cbe9a50607ea6bc8a4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4446f654cf8401b640cc79c2b97af5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec978eb43bc4f9e7df83b0d0195dcda.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/7/4c91a0eb-1442-46fa-bc3a-7a4cce048598.png?resizew=190)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
(2)若由“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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名校
解题方法
9 . 已知函数:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb482d5b5fd2000214a844286b2cd99.png)
(1)当
时,求函数中
的最小值,并求此时
的取值;
(2)求直线
与上述函数的交点的中点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb482d5b5fd2000214a844286b2cd99.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b81fa69ce333c284b948dbbc934518fb.png)
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2023-06-19更新
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169次组卷
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2卷引用:陕西省西安市西北工业大学附属中学2022-2023学年高三上学期9月月考文科数学试题
22-23高二·全国·课后作业
10 . 已知曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71cfcf8c5675d7c7f2dbeec2a2831d9.png)
(1)求过的点
的切线方程;
(2)(1)中以
为切点的切线与曲线
是否还有其他公共点?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71cfcf8c5675d7c7f2dbeec2a2831d9.png)
(1)求过的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c9708ef0dc6d6f5dcf6596d3e4f6e5.png)
(2)(1)中以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c9708ef0dc6d6f5dcf6596d3e4f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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