题目
题型:填空题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185425-21508.gif)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185425-21508.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185425-12299.gif)
f(1)=lg1=0,f[f(1)]=f(0)=a3=1,∴a=1.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185420-45804.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185420-65782.gif)
域和值域;
(2)已知命题P:函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185420-65782.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185420-81402.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185420-22089.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185420-53903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185421-71532.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185421-37583.gif)
围
已知
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185410-43492.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185410-19036.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185410-26375.gif)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185410-84643.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185411-29647.gif)
(Ⅱ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185411-88408.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185411-55936.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185412-25185.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185411-88408.gif)
(Ⅲ)是否存在实数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185412-48959.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185411-29647.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185412-48959.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185405-55591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185405-56872.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185406-90003.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185404-99849.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185356-28529.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185356-37143.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185357-55549.gif)
(2)若对于任意
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185357-21488.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185357-22243.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185357-42279.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819185357-12310.gif)
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