题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145254-70280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145255-67192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145256-24534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145256-19559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145254-70280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145255-67192.png)
(1) 判断函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145256-23744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145255-67192.png)
(2) 若函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145256-35421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145255-67192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-35906.png)
(3)已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145255-67192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-35906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-43547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-88712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-99634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145258-14714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145258-88735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145258-60534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145258-19696.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145256-23744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145255-67192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145258-30664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145259-97416.png)
解析
试题分析:(Ⅰ) 由给出的定义可知
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145256-24534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145254-70280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145255-67192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145254-70280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145255-67192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145259-18518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145259-66135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145259-47120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-43547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145300-83573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145300-45737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-43547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145300-86065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145259-18518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145258-88735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145258-60534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145300-36030.png)
试题解析:解: (1)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145256-23744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145255-67192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-35906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145301-37263.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145301-50192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145256-19559.png)
(2) 由
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145301-45443.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145301-26887.png)
如
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145302-61348.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145302-12553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145302-83233.png)
(3)由题意得,
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145302-31628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145259-18518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145259-66135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145259-47120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-43547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145303-69745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145300-45737.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145303-97768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145303-41188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145303-83489.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145303-33189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145304-67094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145304-76842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145304-66736.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145304-55807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145305-76476.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145305-71450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145305-44542.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145305-37010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145306-81147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145304-76842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145306-65207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145306-34427.png)
且
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145306-89666.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145305-44542.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145306-31343.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145307-71547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145307-73239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145307-67081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145257-93352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145304-76842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145307-57612.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145308-99269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145308-94345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145307-71547.png)
综上所述,所求
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145258-19696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145259-97416.png)
核心考点
试题【对于函数,若存在实数对(),使得等式对定义域中的每一个都成立,则称函数是“()型函数”.(1) 判断函数是否为“()型函数”,并说明理由;(2) 若函数是“()】;主要考察你对函数的相关概念等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145206-53632.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145206-10753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145207-49406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145207-51804.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145208-84181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145208-32932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145208-95853.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145208-35016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145209-83998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145209-36747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145209-22441.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145209-36747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145209-83998.png)
①
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145209-84389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145210-37795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145210-73058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145210-58976.png)
则在区间
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145210-99914.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145210-77255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145153-96827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145154-71975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145154-38140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145154-54890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145154-85866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145154-85866.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145144-67363.png)
(1)求这次行车总费用y关于x的表达式;
(2)当x为何值时,这次行车的总费用最低,并求出最低费用的值.
A.Y中的元素不一定有原象 |
B.X中不同的元素在Y中有不同的象 |
C.Y可以是空集 |
D.以上结论都不对 |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145052-56691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145052-18900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145052-10578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204145053-40975.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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