解题方法
1 . 某同学向老师请教一题:当
时,函数
图像恒在直线
的上方(不含该直线),求实数
的取值范围.老师告诉该同学:“
恒成立,当且仅当
时取等号.且方程
在
上有解”,根据老师的提示可得
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4921923069c4f38a0af1ff8637e35b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00fb8a99de1be30d3c743f0c7ad6f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0852d49275f8774ba92620d8af490c72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7423ff97ad12f080a829e19dd1dbe49d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
2 . 方程
的解
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a94576e0fc11f7d1f662583c35b7281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2019-12-04更新
|
643次组卷
|
7卷引用:上海市上海师范大学附中闵行分校2017-2018学年高三上学期第一次月考数学试题
名校
3 . (1)已知
,求证:
.
(2)已知
,求证:
在定义域内是单调递减函数;
(3)在(2)的条件下,求集合
的子集个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df8babf018f42b32990f65768ed81ef5.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ea5e39c4f2025dbd80d8629c6b71e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)在(2)的条件下,求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3fd56c0a0ba232750157d2241284959.png)
您最近一年使用:0次
2020-01-16更新
|
236次组卷
|
5卷引用:上海市七宝中学2017-2018学年高二上学期开学考试数学试题