名校
1 . 已知函数
,且对任意的
,
.
(1)求
的取值范围;
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b915088fae51f08d1e45a9e9d4bf5554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2766ff1b3629e90c0ee01a93b97b2b2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0588c80fa0ee2598f12eb7725c2e406.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667b619c54f1eb12cb021b199001c411.png)
您最近一年使用:0次
2020-03-23更新
|
678次组卷
|
5卷引用:2020届黑龙江省哈尔滨市第三中学高三3月网络模拟考试数学(文)试题
2 . (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/cba0a3d92a604e519d434ef5af1d12d9.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c55c9f1a79c0594ee6ade90d9718aeaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4b5d261044c6f58deba8de7c0e1e35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931b0673c08a4b6b58811d0b68c4daf2.png)
您最近一年使用:0次
解题方法
3 . 选修4-5:不等式选讲
(1)设
,证明:
;
(2)已知
,证明:
.
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ada798eeba5bd19d497bfd0741afd00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aa428b8f14ca9cefe41eb4e44244fc.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2acd1e0e18c3be37a458b8e35811f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931b0673c08a4b6b58811d0b68c4daf2.png)
您最近一年使用:0次