题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143450-18976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143450-25156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143450-55271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143450-96661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143451-35099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143451-46471.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143451-78369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143450-25156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143451-10539.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143452-14931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143452-26987.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:根据定义,函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143450-18976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143450-25156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143450-55271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143453-86923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143451-35099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143451-46471.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143451-78369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143450-25156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143453-31216.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143453-14325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143453-56243.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143454-71971.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143441-37741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143441-99849.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143441-46022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143441-67256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143442-70416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143442-59580.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143426-50626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143426-12355.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143426-28072.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143426-10439.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143427-92900.png)
(1)设
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143427-55692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143427-46754.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143427-87392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143427-57901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143428-14319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143428-38204.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143403-80078.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143403-76313.png)
(Ⅱ)用函数单调性的定义证明函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143404-25438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143404-11522.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143338-12464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143338-12464.png)
(Ⅰ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143338-94944.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143339-19353.png)
(Ⅱ)函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143339-89269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143339-95452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143339-57270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143252-32184.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143252-92254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143252-92254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143252-32184.png)
例如:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143252-87131.png)
(Ⅰ)判断下列函数:①
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143252-10157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143253-21419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143253-63660.png)
(Ⅱ)判断函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143253-37256.png)
(Ⅲ)证明:对于任意实数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143253-32958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143254-70663.png)
(注:“
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143254-38294.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204143254-97350.png)
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