【题文】已知函数,,它在上单调递减,则的取值范围是 ( )A.B.C.D.
【题文】已知函数,,它在上单调递减,则的取值范围是 ( )A.B.C.D.
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【题文】已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092905-75803.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092906-35032.png)
,它在
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092906-64896.png)
上单调递减,则
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092906-42037.png)
的取值范围是 ( )
答案
【答案】C
解析
举一反三
【题文】设函数
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092857-29586.png)
,则不等式
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092857-78190.png)
的解集是( )
【题文】
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092852-37144.png)
【题文】已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092847-86888.png)
的定义域为
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092847-10467.png)
,值域为
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092848-39785.png)
,试确定这样的集合
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092847-10467.png)
最多有 个
【题文】已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092841-37715.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092841-77064.png)
,对于任意的
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092841-33254.png)
都能找到
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092842-74212.png)
,使得
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092842-63836.png)
,则实数
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092842-75984.png)
的取值范围是
.
【题文】若
![](http://img.shitiku.com.cn/uploads/allimg/20200327/20200327092837-94081.png)
,则
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