1 . 当
时,下列不等关系成立的是________ .
①
;②
;
③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689f982af451283289255c87593ec338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c35b63f3612117fff6e59e64ffae9f.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48fe5d9cbe4f83926f5c21912df67a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd7387b4a7046fb064ce285318bba0c.png)
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2023-08-28更新
|
325次组卷
|
2卷引用:人教A版(2019) 必修第一册 数学奇书 学业评价(十一) 基本不等式
名校
2 . 《几何原本》中的几何代数法是以几何方法研究代数问题,这种方法是后西方数学家处理问题的重要依据,通过这一原理很多的代数公理或定理都能够通过图形实现证明,也称之为无字证明,现有图形如图所示,
为线段
上的点,且
为
的中点,以
为直径作半圆,过点
作
的垂线交半圆于
,连结
,过点
作
的垂线,垂足为
,若不添加辅助线,则该图形可以完成的所有无字证明为_________ .(填写序号)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/515a8637-30c5-4728-85f4-0240e20f3913.png?resizew=161)
①
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7009eee373cc98ef7c8243901ec83037.png)
③
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91ff0b118e5145f94c90c975e1fb74ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b20740df2f6ae49f8dc88d2449897f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/515a8637-30c5-4728-85f4-0240e20f3913.png?resizew=161)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4d4e4d991871f2f35309b1604c9fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7009eee373cc98ef7c8243901ec83037.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8378bcf7139202d78b706b726602caa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39dce2a6f257ad000947a4261da9783.png)
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2023-02-02更新
|
475次组卷
|
5卷引用:上海市南洋模范中学2021-2022学年高一上学期期中数学试题
解题方法
3 . 设
,且
,
,有以下结论:①
;②
;③
;④
.则所有正确的结论序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea134f599285e3d32d2ab3e7186990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b3ebed48714649e40c83f3518af52a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3229404458a5031e2ee83a550abcdca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b4a5b722ff0d0e340bfacad99a818b.png)
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4 . 设a、
,
,有下列不等式:①
;②
;③
;④
.其中恒成立的个数是______ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd0914dc4d4c7f75710ff460a286fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/775da52de420f9cb8576daae625b0435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0defbce6e08542fbcf1f527a6d8cd85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3963df23b4eea847c15acc328d645e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa23408bcc9f6200f22a310e5f2569a.png)
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5 . 若a、b、
,且满足
,
,
,则
与ab的大小关系是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f306d2b261f4c39a9fc0858d96e647.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/5e8afa3dc14fd632d8b251c8e279c5ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/566f7614d51f0348db982a9440de8844.png)
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名校
6 . 已知
,
,
,则在下列不等式①
;②
;③
;④
;⑤
其中恒成立的是___________ .(写出所有正确命题的序号)
![](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/4a7dbc702617c765a573961953cc0901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8564d76ca5357c0f6237e48086d23f75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec307143b4bf45106369f256a796d61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ed2296215d64f2df2cedc608a10dc61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f74ed01523c6de67b01c24bfe52b6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/286599adad18d9fd48fae72d5062e9e5.png)
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2021-11-07更新
|
408次组卷
|
3卷引用:上海市延安中学2021-2022学年高一上学期期中数学试题
上海市延安中学2021-2022学年高一上学期期中数学试题(已下线)第06讲 基本不等式-【暑假自学课】2022年高一数学暑假精品课(人教版2019必修第一册)沪教版(2020) 一轮复习 堂堂清 第一单元 1.8 基本不等式及其应用
2021高一·上海·专题练习
7 . 若a>0,b>0,且a+b=4,则下列不等式恒成立的是________ (填序号).
①
;②
;③
≥2;④a2+b2≥8.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f230cd82a6bb5c59e9bed4689a44053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0298c3d5e8b8586382837fbffeac1b34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d7009d4cbe7157d63ce50444443716.png)
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2021-08-18更新
|
778次组卷
|
4卷引用:第10讲 平均值不等式及其应用-【A+课堂】2021-2022学年高一数学同步精讲精练(沪教版2020必修第一册)
(已下线)第10讲 平均值不等式及其应用-【A+课堂】2021-2022学年高一数学同步精讲精练(沪教版2020必修第一册)(已下线)第3章 不等式 单元综合检测(基础过关)(单元培优)-2021-2022学年高一数学课后培优练(苏教版2019必修第一册)(已下线)2.2 基本不等式-高一数学同步精品课堂(人教A版2019必修第一册)(已下线)考点26 基本不等式-备战2022年高考数学一轮复习考点帮(浙江专用)
19-20高一·全国·课后作业
8 . 给出下面三个推导过程:
①∵a,b为正实数,∴
+
≥2
=2;
②∵a∈R,a≠0,∴
+a≥
=4;
③∵x,y∈R,xy<0,∴
+
=-
≤-2
=-2.
其中正确的推导过程为________ .
①∵a,b为正实数,∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6ce02259a85ea191541f4a708738f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2122e3f1e76a635e58e4d54aa594c552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78612275477d536aa7852cfd0affa2e8.png)
②∵a∈R,a≠0,∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541e2b075f78708474aa42d88bf47dd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b7065816dee39543516949544cfc26.png)
③∵x,y∈R,xy<0,∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7bf9200b351a259ddfc6c0266129d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916bb2cc1b29574ff95b47567c59ee0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20964753f5917fa2b6e52ce6b1b403de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2038aad219ab18479d4b1e9830618110.png)
其中正确的推导过程为
您最近一年使用:0次
9 . 在
,
的情况下,下面四个结论:
①
;
②
;
③
;
④
.
其中正确的是___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da880fccd5490abf574da77da9e04a59.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d702d8b5a3199747bf9700d536cebb1.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb2e31608320e989afeeed9a7a8482d.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353a0504082335c98b71653317beabbe.png)
其中正确的是
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10 . 设
,则
,
,
,
,
,
按从小到大顺序排列是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.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/78d7009d4cbe7157d63ce50444443716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f89a8b5cf6996a6455375e405bfb9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4dda7369edf57a39cfad583031328a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc8b26fb79c1f4d36130c41b18c0f9c.png)
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