名校
解题方法
1 . 已知函数
.
(1)若
,
恒成立,求实数
的取值范围;
(2)若
的最小值为5,且正数a,b,c满足
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93601c572ce6fc8e40f5e748c42a17f9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369100ccd44feaa77e5f119ea949a879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91beeecb519bfc3c9afbd86f0537e589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aae622f238d45382a3a386ee1f83022.png)
您最近一年使用:0次
2023-03-02更新
|
1229次组卷
|
5卷引用:西藏日喀则市2022-2023学年高二下学期期末统一质量检测数学(文)试题
名校
解题方法
2 . 已知
设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c79271a19471a8f4910b018074c0fc1.png)
(1)若
,求不等式
的解集;
(2)若函数
的最小值为1,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fed98a219097783e0ca2f41483cac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c79271a19471a8f4910b018074c0fc1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7126d6d76248996a222631cc9ea93c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af7e5cd65bc9d3051c2c72311ca8f88d.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079ed82c42ab357242a19f7ea758a137.png)
您最近一年使用:0次
2021-02-18更新
|
529次组卷
|
6卷引用:西藏自治区拉萨中学2021届高三上学期第四次月考数学(理)试题