【题文】设,则( )A.B.0C.D.
【题文】设,则( )A.B.0C.D.
题型:难度:来源:
【题文】设
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035200-73569.png)
,则
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035200-86446.png)
( )
答案
【答案】C
解析
【解析】
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035201-60822.png)
,故选C
考点:分段函数
举一反三
【题文】已知集合M={f(x)
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035151-31092.png)
},有下列命题
①若f(x)=
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035151-61361.png)
,则f(x)
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035152-67968.png)
M;
②若f(x)=2x,则f(x)
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035152-67968.png)
M;
③f(x)
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035152-67968.png)
M,则y=f(x)的图像关于原点对称;
④f(x)
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035152-67968.png)
M,则对于任意实数x
1,x
2(x
1![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035152-70383.png)
x
2),总有
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035152-32035.png)
【题文】若函数
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035124-55099.png)
在
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035125-41722.png)
上单调递增,则实数
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035125-67610.png)
的取值范围是( )
【题文】若函数
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035102-65769.png)
满足
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035102-42067.png)
,对定义域内的任意
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035103-59069.png)
恒成立,则称
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035102-65769.png)
为m函数,现给出下列函数:
①
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035103-57334.png)
; ②
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035103-28857.png)
; ③
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035103-40996.png)
; ④
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035103-63178.png)
其中为m函数的序号是
.(把你认为所有正确的序号都填上)
【题文】设函数
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035053-43887.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035053-60286.png)
>1,则a的取值范围是
【题文】设函数
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035028-10525.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20200325/20200325035029-86057.png)
>1,则a的取值范围是
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