20-21高一·江苏·课后作业
1 . 计算下列两个数的算术平均数与几何平均数(其中
):
(1)2,8;
(2)3,12;
(3)p,
;
(4)2,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
(1)2,8;
(2)3,12;
(3)p,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d588b8333c14c140bc7617f7abafc3.png)
(4)2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a80b9f2e6c688236d68b3fc93ae65af8.png)
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20-21高一·江苏·课后作业
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2 . 如图,
为梯形,其中
,
,设O为对角线的交点.
表示平行于两底且与它们等距离的线段(即梯形的中位线),
表示平行于两底且使梯形
与梯形
相似的线段,
表示平行于两底且过点O的线段,
表示平行于两底且将梯形
分为面积相等的两个梯形的线段.
,
,
,
与代数式
,
,
,
之间的关系,并据此推测它们之间的一个大小关系.你能用基本不等式证明所得到的猜测吗?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d42e97eee705d164e6ac6de9ecd6d1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0786732df29e599cd67cd69e5a1a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae57e49b519bb89ea02274318a34438d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d9a39b4dab211a19ee2950a93c7049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59000198fc5779f7ecf141860ff08a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae57e49b519bb89ea02274318a34438d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f89a8b5cf6996a6455375e405bfb9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d7009d4cbe7157d63ce50444443716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4dda7369edf57a39cfad583031328a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc8b26fb79c1f4d36130c41b18c0f9c.png)
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2021-10-30更新
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5卷引用:苏教版(2019)必修第一册课本习题第3章复习题
苏教版(2019)必修第一册课本习题第3章复习题(已下线)第二章 一元二次函数、方程和不等式(压轴必刷30题4种题型专项训练)-【满分全攻略】(人教A版2019必修第一册)(已下线)第三章本章回顾江苏省连云港高级中学2023-2024学年高一上学期第一次学情检测数学试题湖北省荆门市东宝中学2023-2024学年高一上学期期中数学试题
解题方法
3 . (1)设x,y为正数,
,证明
;
(2)x,
,
,求证:对于任意正整数n,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b344a55415f511aa8f43d47684bb050f.png)
(2)x,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7534520ae43c10f7b1b48168ee527315.png)
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解题方法
4 . 已知函数
在
上单调递减.
(1)求实数
的取值范围;
(2)当实数
取最大值时,方程
恰有二解,求实数
的取值范围;
(3)若
,求证:
.(注:
为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b8744c94d54246ce023e8a88b998c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d303edb2b74f0152e9da9e0b77a1ca37.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f826c4322fdbf0838670d917f7735e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f86f9b0f357d6166ebc79012bf88706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55278cd8cbc74b25a26141e20fe78e16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9003a22f3bfbdc2dba7869c0f7d54c8c.png)
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解题方法
5 . 在平面直角坐标系
中,函数
的图象过点
,且在点P处的切线
恰好与直线
垂直.
(1)求函数
的最大值;
(2)若正数
,
,
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7455cd7a24b4985e0779efc79b5d11bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62648bbd5919a180a059169c3fea98e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676b05d4baad4148c4fb3b052f32d065.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b85cbf4d2253bd4077cfb4886751e0.png)
(2)若正数
![](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/2193edd12ed74d977e2edb6f3c7f3058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/972a76452271b2bb0ec10a450a86607f.png)
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2021-05-28更新
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3卷引用:西南名校联盟2021届高三下学期4月高考适应性考试数学(理)试题