1 . 证明不等式:
(1)若
,
且
,则
;
(2)若
,
是实数且
,则
;
(3)把(1)和(2)中的不等式推广到一般情形,并证明你的结论.
(1)若
![](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/bb82da7d6889d032ece3f1b1dc10d571.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/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4937e38b3dee8128e5b9914e0a055b.png)
(3)把(1)和(2)中的不等式推广到一般情形,并证明你的结论.
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2 . 证明下列不等式:
(1)若
,则
;
(2)对任意
,有
;
(3)对任意
,有
;
(4)若
,则
.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74bc05ba2e70080935ad46836f134de.png)
(2)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40865b13c775d3f26490aba72d5deb5d.png)
(3)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c197486dfb1671a5f3b33ac8d4c6dbdf.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31be670d32e753012125c503f2f3be56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d8eb08f685cda451c7ceaa42008931.png)
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21-22高二·全国·课后作业
3 . 城市的许多街道是相互垂直或平行的,因此,往往不能沿直线行走到达目的地,只能按直角拐弯的方式行走.如果按照街道的垂直和平行方向建立平面直角坐标系,对两点
和
,定义两点间距离为
.
(1)在平面直角坐标系中任意取三点A,B,C,证明
;
(2)设
,分别找出(1)中不等式等号成立和等号不成立时点C的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05193d9096bd9da9230acc14228aa4e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4920bf4db93b18d4ecfdc05e310dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b18aa17f8494cd1cdeb98783883f7fc.png)
(1)在平面直角坐标系中任意取三点A,B,C,证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bcaabd563b35f69c5059c8d4e71a98.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec3f0349a972389b6b799a2f10c76ff.png)
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2022-02-28更新
|
191次组卷
|
3卷引用:人教B版(2019)选择性必修第一册课本习题习题2-1
21-22高一·湖南·课后作业
4 . 利用不等式的性质证明下列不等式:
(1)若
,
,则
;
(2)若
,
,则
.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75807858b7804a1ad2039c41f323a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5197a4059d79e7ad2954b387d17d1ac8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ab74d7f34dda733dca9aa3dac2a282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557f1c548c99f9b3a96ad97155617148.png)
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2022-02-23更新
|
619次组卷
|
8卷引用:3.1 不等式的基本性质 (1)
(已下线)3.1 不等式的基本性质 (1)(已下线)2.1 等式性质与不等式性质精练-【题型分类归纳】(已下线)专题2.1 等式性质与不等式性质-举一反三系列湘教版(2019)必修第一册课本习题 习题2.1(已下线)习题2.1(已下线)专题15 等式性质与不等式性质-2022年暑假初三升高一数学衔接知识自学讲义(人教A版2019)(已下线)突破2.1 等式的性质与不等式的性质(课时训练)(已下线)第05讲 等式性质与不等式性质(7大考点)-2022-2023学年高一数学考试满分全攻略(人教A版2019必修第一册)
20-21高一·江苏·课后作业
解题方法
5 . 设
,
,求证:
.
![](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/e2ef4d674980ce4e52f12da2ca46065f.png)
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20-21高一·江苏·课后作业
解题方法
6 . 已知
,求证:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753bc7b46730ab08df9ee4488ce34986.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae5f93f5e7ba309f529af75cb76dfcc.png)
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20-21高一·江苏·课后作业
解题方法
7 . 已知
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ada798eeba5bd19d497bfd0741afd00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4a8ffa80d00ef77c53c9853e3c6e7d.png)
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20-21高一·江苏·课后作业
8 . 设a,b,c,d是实数,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c76da5edd4633d1fb68e3a4ede06473.png)
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21-22高一·湖南·课后作业
解题方法
9 . 证明下列不等式,并讨论等号成立的条件:
(1)若
,则
;
(2)若
,则
;
(3)若
,则
;
(4)若
,则
;
(5)对任意实数
和
,
.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d87d567e5ccc0d31d063609810e5cc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a655d6935ae3f646e17ff72bc213e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b20f398d8772984301018f832966b14.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6343069217cd6d8dd32446da428dae46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f23c87e770c3cc61bad09643926ae6.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46973ec354692c420913269bc23a8035.png)
(5)对任意实数
![](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/91a470f596a01c8273f55b9fb394b0f6.png)
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20-21高一·全国·课后作业
10 . 证明:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70410f095a6d5b4b66ece2ad7bf1e461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e8aee4986216ee82f6185497ea71c8.png)
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