【题文】 已知,那么的取值范围( ) A.(0,1)
【题文】 已知,那么的取值范围( ) A.(0,1)
题型:难度:来源:
【题文】 已知
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072723-71665.png)
,那么
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072723-33715.png)
的取值范围( )
A.(0,1) B,
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072723-51692.png)
C.
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072723-21112.png)
D.
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072723-30586.png)
答案
【答案】C
解析
【解析】解:因为
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072724-67218.png)
,那恶魔0<a<1,a>
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072724-27929.png)
,且有0
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072724-90086.png)
7a-1,解得为
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072723-21112.png)
,选C
举一反三
【题文】 已知
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072649-71342.png)
,那么
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072649-51355.png)
的取值范围( )
A.(0,1) B,
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072649-49277.png)
C.
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072650-17114.png)
D.
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072650-17624.png)
【题文】.函数
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072645-22447.png)
的单调增区间是______________.
【题文】.定义在
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072627-95309.png)
上的函数
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072627-98695.png)
满足
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072628-32346.png)
,则
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072629-38083.png)
( )
A.![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072629-43081.png) | B.0 | C.1 | D.2 |
【题文】.函数
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072620-46780.png)
的单调增区间是______________.
【题文】.定义在
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072615-75165.png)
上的函数
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072616-83438.png)
满足
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072616-93083.png)
,则
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072616-63849.png)
( )
A.![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325072616-97392.png) | B.0 | C.1 | D.2 |
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