名校
解题方法
1 . (1)
的三个内角
成等差数列,
的对边分别为
.求证:
.
(2)已知:
为互不相等的实数,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/043714f337a44c343813c4e34f699211.png)
(2)已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a14c388e1e2e5a2ff1ccf6caffbee0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa4b450e9269a7ef67582e7359f0125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b2d4c175ae8fadf2da3078ec2904d4.png)
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名校
2 . 证明下列各题:
(1)求证:
;
(2)用综合法或分析法证明:若
,则
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add637eef4cd8802b4eb211aa4f6e572.png)
(2)用综合法或分析法证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf04fe8895c10624636a815d3d752975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da537e5284dc9786845fca39a9ca913.png)
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3 . (1)设
,
,
,用综合法证明:
;
(2)已知
,
,且
,用反证法证明:
和
中至少有一个小于2.
![](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/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbefc06b3b4e54a6a1690e870efc69b.png)
(2)已知
![](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/69bbd0aae5a4f6129fc78f88f662f092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165b2250624fc1f1551d6c38991487d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb82093f9c1ec3ee4218ae8f8377644.png)
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4 . 设
.
(1)若
,证明:
;
(2)已知
,
且
,用分析法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114b1d85a3f52a2959c49ec25630dfaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec307143b4bf45106369f256a796d61.png)
(2)已知
![](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/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4dcc5d823c113fcd61c4b7e9639a5a9.png)
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5 . (1)用综合法证明:设a,b均为正实数,且
,则
;
(2)试比较下列各式的大小(不写过程):①
与
;②
与
;通过上式请你推测出
与
(
且
)的大小,并用分析法加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98941347dd7ac01f5e63a6c5930dd5fa.png)
(2)试比较下列各式的大小(不写过程):①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d37b9f0421c90b1033dae9e3362c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d1df3af8b2e212bc6d114959139823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d1df3af8b2e212bc6d114959139823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5246364ca8d76ddd707a001fe98cbb5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4457e63251cc30112b0146f99e71eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5e5ca35ca665d421c919c97601539bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a40142c84be68ee2918c3a8303388c.png)
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2023-02-04更新
|
75次组卷
|
2卷引用:河南省郑州市励德双语学校2021-2022学年高二下学期第一次月考数学(理)试题
名校
解题方法
6 . (1)已知b克糖水中含有a克糖
,再添加m克糖
(假设全部溶解),糖水变甜了.我们将这一事实表示为不等式:当
时,有
,请证明这个不等式;
(2)设
的三边长分别为
,请利用第(1)问已证不等式证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d49655ebe52ed0e7561f0da99cbe9fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111f948bc9a44eef670a04f31e4dedd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0ba96a400a4c158eefc9648b0c130c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16171f1f79d33dbdf4e2dc280b16943.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f13a05f5aca98574bb1f927123490de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f4233a7afad30d1ae8f8cda1901a9e.png)
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2022-10-23更新
|
270次组卷
|
5卷引用:四川省眉山市彭山区第一中学2022-2023学年高一上学期10月月考数学试题
四川省眉山市彭山区第一中学2022-2023学年高一上学期10月月考数学试题陕西省西安市鄠邑区2022-2023学年高二下学期期中模拟理科数学试题福建省莆田第一中学、擢英中学2023-2024学年高一上学期10月月考数学试题(已下线)第二章 一元二次函数、方程和不等式单元复习提升-速记·巧练(人教A版2019必修第一册)云南省昆明市第八中学2023-2024学年高一上学期12月月考数学试题
7 . (1)设
,证明:
;
(2)已知
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ada798eeba5bd19d497bfd0741afd00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a737185eb85ca24cf66409ce1e09bc.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9185519a1b1928d6cd4147f43c738145.png)
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2022-09-15更新
|
188次组卷
|
2卷引用:陕西省延安市第一中学2021-2022学年高二下学期期中理科数学试题
8 . 已知数集
具有性质
:对任意的
,
,使得
成立.
(1)分别判断数集
与
是否具有性质
,并说明理由;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8018bcaf07ba1108852d7db39a4d76f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/859279baaa42ef5677787f2ea041c621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50e074253129381db7e717b4a285886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1e76d1341e8e6bd89b7075150536bd.png)
(1)分别判断数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a361c45dbf7ad37aed786c81c94aef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dcaf423d54476e4d59e51d5e4ef7270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378b4292d4db9a1b1128f75dd3855830.png)
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9 . 已知
,…,所以
,
,….
(1)根据材料,归纳出一个一般性的不等式结论;
(2)用两种方法证明(1)中的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d4f72da889eca5f1fe35ea37e52a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e85a9c6fc4f4d72b373a35e34f30ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141cc86aeeea21e327720faa5eb64dd5.png)
(1)根据材料,归纳出一个一般性的不等式结论;
(2)用两种方法证明(1)中的结论.
您最近一年使用:0次
2022-07-13更新
|
42次组卷
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2卷引用:河南省商开大联考2021-2022学年高二下学期期末数学(理)试题
10 . (1)设实数
、
、
成等比数列,非零实数
、
分别为
与
、
与
的等差中项.求证:
;
(2)三角形
的三边
、
、
的倒数成等差数列,求证:
.
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79e66286858d0890e324f63b698c39f.png)
(2)三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc74ad5dbb6029f4bd4ea0d52f576945.png)
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