解题方法
1 . 阅读:序数属性是自然数的基本属性之一,它反映了记数的顺序性,回答了“第几个”的问题.在教材中有如下顺序公理:①如果
,那么
;②如果
,那么
.
(1)请运用上述公理①②证明:“如果
,那么
.”
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe96cc58c73271a157f908b4261620a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069390dd908ff203327958117a226593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dac0a497d02926a23678d5dc6bcf79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34c5832f3fe28f48a924854cb8814ba.png)
(1)请运用上述公理①②证明:“如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a6c4658978e20d4074a1099de1e15a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f50ce6b511e6b928796e048fc7fa5c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af26bd7fd83da5267ed64b3f22ad59a0.png)
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解题方法
2 . 在平面直角坐标系
中,椭圆
与双曲线
有公共顶点
,且
的短轴长为2,
的一条渐近线为
.
(1)求
,
的方程:
(2)设
是椭圆
上任意一点,判断直线
与椭圆
的公共点个数并证明;
(3)过双曲线
上任意一点
作椭圆
的两条切线,切点为
、
,求证:直线
与双曲线
的两条渐近线围成的三角形面积为定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.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/fab8a0cc6504aa4c3a38006f5394b4c2.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/e3f52cb58b6bc5d71030463ba7e28134.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf0d139c9810361b4971904a943856b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7b5a74a10686910113e756e5add888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(3)过双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53147c1ea72065497f424f84d92da2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fcb20a6972108871adbf284f9e5006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
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2022-11-04更新
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581次组卷
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3卷引用:江苏省常州市溧阳市2022-2023学年高二上学期期中数学试题
名校
3 . 汽车前灯反射镜曲面设计为抛物曲面(即由抛物绕其轴线旋转一周而成的曲面).其设计的光学原理是:由放置在焦点处的点光源发射的光线经抛物镜面反射,光线均沿与轴线平行方向路径反射,而抛物镜曲面的每个反射点的反射镜面就是曲面(线)在该点处的切面(线).定义:经光滑曲线上一点,且与曲线在该点处切线垂直的直线称为曲线在该点处的法线.设计一款汽车前灯,已知灯口直径为20cm,灯深25cm(如图1).设抛物镜面的一个轴截面为抛物线C,以该抛物线顶点为原点,以其对称轴为x轴建立平面直角坐标系(如图2)抛物线上点P到焦点距离为5cm,且在x轴上方.研究以下问题:
(2)求P点坐标.
(3)求抛物线在点P处法线方程.
(4)为证明(检验)车灯的光学原理,求证:由在抛物线焦点F处的点光源发射的光线经点P反射,反射光线所在的直线平行于抛物线对称轴.
(2)求P点坐标.
(3)求抛物线在点P处法线方程.
(4)为证明(检验)车灯的光学原理,求证:由在抛物线焦点F处的点光源发射的光线经点P反射,反射光线所在的直线平行于抛物线对称轴.
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2022-04-19更新
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1109次组卷
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5卷引用:3.3.2 抛物线的几何性质(难点)-2022-2023学年高二数学《基础·重点·难点 》全面题型高分突破(苏教版2019选择性必修第一册)
(已下线)3.3.2 抛物线的几何性质(难点)-2022-2023学年高二数学《基础·重点·难点 》全面题型高分突破(苏教版2019选择性必修第一册)辽宁省盘锦市辽东湾实验高级中学2021-2022学年高二下学期4月月考数学试题(已下线)专题25 圆锥曲线的光学性质及其应用 微点4 圆锥曲线的光学性质综合训练(已下线)第13讲 抛物线(9大考点)(2)(已下线)压轴小题9 抛物线的切线与法线问题(压轴小题)
名校
解题方法
4 . 悬索桥(如图)的外观大漂亮,悬索的形状是平面几何中的悬链线.
年莱布尼兹和伯努利推导出某链线的方程为
,其中
为参数.当
时,该方程就是双曲余弦函数
,类似的我们有双曲正弦函数
.
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900721970536448/2907279254913024/STEM/8a914e2499134cf68207c8add767fe65.png?resizew=325)
(1)从下列三个结论中选择一个进行证明,并求函数
的最小值;
①
;
②
;
③
.
(2)求证:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/046db679c09a10434e81f7a01c55e243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad2f5a11d7437f506adab0996961269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0099b9b80ed478824fa95677ebe9d5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3321510a9eb73909a36c084a8630e89.png)
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900721970536448/2907279254913024/STEM/8a914e2499134cf68207c8add767fe65.png?resizew=325)
(1)从下列三个结论中选择一个进行证明,并求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3634cf0ca04b381dec8fcfee8805bdac.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff61bdd9ed784248cfdcc965ce06db0.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40ff30f6f7fca28159dedeff7168c74.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c3de984177769fa426e10eb14cd82c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0645c3c42e19271f86a10b1fe9dbb0f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b39ee39c38f49390a03be161109a2b4.png)
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2022-02-01更新
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1298次组卷
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7卷引用:江苏省苏州市2021-2022学年高一上学期期末数学试题
江苏省苏州市2021-2022学年高一上学期期末数学试题湖南省株洲市第二中学2021-2022学年高一下学期“同济大学”杯数理化联赛数学试题重庆市2023届高三下学期3月月度质量检测数学试题湖南省株洲市南方中学2022-2023学年高一下学期期末数学试题(已下线)重难点突破02 函数的综合应用(九大题型)(已下线)压轴题函数与导数新定义题(九省联考第19题模式)讲(已下线)压轴题三角函数新定义题(九省联考第19题模式)讲
21-22高一·湖南·课后作业
解题方法
5 . 证明不等式:
(1)若
,
,
,
都是正数,求证:
;
(2)若
,
,
是非负实数,则
;
(3)若
,
是非负实数,则
;
(4)若
,
,则
.
(1)若
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e7387a3fbab6508695365955f55258.png)
(2)若
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d92a6b95fdfdedb405447340293bdc.png)
(3)若
![](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/727ff3ac24b506706045956c16336f94.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19339e3904e9541ff26b30ae5f1242b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f58b9bc974b789928f6490acb43fb3.png)
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6 . 已知:底与腰之比为
的等腰三角形为黄金三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/d906e69c-33ad-47c1-87a1-046eb54ce27b.png?resizew=337)
(1)如图1,
即为黄金三角形尺规作图.已知
,求
长为______,
为______.
(2)如图2,即为正五边形尺规作图.求证:五边形
(所作图形)即为正五边形.
(3)请用另一种方法尺规作图作出正五边形.简要叙述作图方法,无需作图.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029d393bb07b7140905b85f550519de4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/d906e69c-33ad-47c1-87a1-046eb54ce27b.png?resizew=337)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(2)如图2,即为正五边形尺规作图.求证:五边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
(3)请用另一种方法尺规作图作出正五边形.简要叙述作图方法,无需作图.
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7 . 求证:数列
中一定有2022的倍数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69719252d1232ef3ce59579f51104c81.png)
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8 . 已知
为方程
的解,
,
(1)求证:
.
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99606defee81cacc6652482953b6818c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911958db7bf41c17393a895b6743fac4.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c4b1b48220a0c16bc22c1dfaa1acc0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33e8fca2d3aa21ff0f7ef6962e66651.png)
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9 . 已知函数
.
(1)记集合
,若
,求证:
;
(2)设函数
,若存在实数
,使
,求实数
取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041d7fe67bbac3c33cf518b569e0db62.png)
(1)记集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8ceab71f602458b1ef071c778ff31f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f586ebc64ac4c87b1ceed35c8bdb7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530d3bb7d7268d51194c09198531f19a.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f750d5d121271c431f35164f2f87212c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc9176a9d1bf52fd1b4e58b88c46032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2022-12-18更新
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820次组卷
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2卷引用:江苏省南通中学2022-2023学年高一上学期第二次月考数学试题
名校
解题方法
10 . 已知函数
在
是减函数.
(1)求实数a的取值范围;
(2)记![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7bc56c99c9a6a751d92a8b398e82ee.png)
,当
时,
①求证:
在区间
内存在唯一极值点(记为
);
②求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5854a3e006a1503b38666e56381d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71163f419555f2ed76075c8ff659fbfc.png)
(1)求实数a的取值范围;
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7bc56c99c9a6a751d92a8b398e82ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5e07bf129b073f37b553fbca100172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fdbfcf9ffd7cdf7a74a8680afea926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c642de19a879df2e18cc5c5c44bd5b07.png)
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