1 . 已知函数
.
(1)讨论
的单调性;
(2)若对任意的
,存在
,使得
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adab31dba50d0320c510a21e49d4913c.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca3c74f5e721d8e3277c7757fb9d657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2 . 已知函数
.
(1)当
时,不等式
恒成立,求实数
的取值范围;
(2)证明:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a70bf8f3a91f7c20f15ff3bc14642ace.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aeecb8b31e9af9370d913fc3c452ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf2ae86c0e9fdca9e2a3ab306816fb0.png)
您最近一年使用:0次
2019-11-12更新
|
809次组卷
|
2卷引用:贵州省安顺市2019-2020学年高三上学期第一次联考数学(理)试题