解题方法
1 . 已知函数
.
(1)求不等式
的解集;
(2)设a,b,c均为正数,
最大值为m,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc8663b169232d797b1699bfec215e1.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e799e937076aa5a7dcd51cdc0f40f6b0.png)
(2)设a,b,c均为正数,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86be2de99fbf7f99cd54ab399146b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13854b4c05aa4921a06be1e966f02af.png)
您最近一年使用:0次
2021-08-07更新
|
222次组卷
|
2卷引用:陕西省安康市2020-2021学年高二下学期期末文科数学试题
解题方法
2 . 已知
.
(1)关于
的不等式
有解,求实数
的取值范围;
(2)设
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7e788805d579a8ac018f1ccd365c60.png)
(1)关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa13ba4fb4f12f39229b3327f85b198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cb52464e97ac3546bbfbe3514fcbe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ad5cfb7effa1c06226413e2bc49d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fcf5e1fbaf4c1e10cd5eb1428e0c6f2.png)
您最近一年使用:0次
2021-05-04更新
|
215次组卷
|
3卷引用:江西省萍乡市2021届高三二模考试数学(文)试题
2020高一·上海·专题练习
解题方法
3 . 下列四个不等式:
①logx10+lg x≥2(x>1);
②|a-b|<|a|+|b|;
③
≥2(ab≠0);
④|x-1|+|x-2|≥1.
其中恒成立的是________ (填序号).
①logx10+lg x≥2(x>1);
②|a-b|<|a|+|b|;
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1b46208c835b55240261fefba8fe4.png)
④|x-1|+|x-2|≥1.
其中恒成立的是
您最近一年使用:0次
名校
解题方法
4 . 已知函数
.
(1)求不等式
的解集;
(2)已知函数
的最小值为
,若
均为正实数,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dbd86aa159120a9be3f1e49c25e4519.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f61db73a5a9bce4ece8259a4c7d29376.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86be2de99fbf7f99cd54ab399146b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b60663f5358d06d0c909c1c52e2f8cf.png)
您最近一年使用:0次
真题
解题方法
5 . 数列
由下列条件确定:
.
(1)证明:对
,总有
;
(2)证明:对
,总有
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021ff552b369d9b440e2b9b9818c3d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527bc0bbda1be93c64b43fec10a9c1f3.png)
(1)证明:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1232975547331b0bb85d6025aed457.png)
(2)证明:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e0d2777105951c7db3a3319f6c6d87.png)
您最近一年使用:0次
名校
解题方法
6 . 回答下列问题:
(1)用综合法和分析法两种方法证明基本不等式
(
).
(2)对于4个正数a,b,c,d尝试证明
.
(1)用综合法和分析法两种方法证明基本不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf792226cca41c2cf01f5c97874c7864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb83e5f347aac3383335a269b1fc687d.png)
(2)对于4个正数a,b,c,d尝试证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e49ff7709866b469e403762cf32f2473.png)
您最近一年使用:0次
21-22高三上·全国·阶段练习
解题方法
7 . 设函数
.
(1)若
,求
的取值范围;
(2)若
,在(1)的条件下,记
的最小正整数为
,且正实数
,
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2dc1ccc320976a4ae5b0425fe6b8a9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c0993500d9c4784c57845d57647d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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/779aafbe0e6b299ccd5af3e4de5a2732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a303bf7a5a44f602738510defca840c0.png)
您最近一年使用:0次
解题方法
8 . 已知
,
,且
.
(Ⅰ)若对于任意的正数
,
,不等式
恒成立,求实数
的取值范围;
(Ⅱ)证明:
.
![](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/04959523a28786962d51cfb43a8767d7.png)
(Ⅰ)若对于任意的正数
![](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/46bfeb06a3ca0c92af38e51a1dad303c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(Ⅱ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2274aeecab57750e0fcac7fd25ff55.png)
您最近一年使用:0次
9 . 已知关于
的不等式
的解集为
.
(1)求
的最大值
;
(2)在(1)的条件下,若
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a736211016e12ab154f4d07c86f3b9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dab9e79198239cda875305fd6809b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964294bd804a8fc6dd5ff5a0ef669e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaacfaef44a654c0a1c283ef03fc0550.png)
您最近一年使用:0次
2020-03-19更新
|
260次组卷
|
2卷引用:2020届泉州市高三毕业班线上质量检测理科数学试题
解题方法
10 . 已知
,函数
.
(1)当
时,求不等式
的解集;
(2)当
的最小值为4时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4490503c29b1743ca34b05e900d8730.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0d7fbcc396c7b646c31f60e32d9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a075dce77c9a6b964a8a3fc1ee6e8c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814cf6e352cd0f9685f4d5e026038369.png)
您最近一年使用:0次
2020-02-17更新
|
277次组卷
|
3卷引用:2020届湖南省常德市高三上学期期末数学理科试题