题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210235-73853.gif)
A.是增函数又是偶函数; | B.是增函数又是奇函数 |
C.是减函数又是偶函数; | D.是减函数又是奇函数 |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210235-16704.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210236-50731.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210236-32255.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210236-50731.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210223-39934.gif)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210223-42961.gif)
(2)函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210224-54448.gif)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210224-20532.gif)
销售单价/元 | 65 | 50 | 45 | 35 | 15 |
日销售量/件 | 15 | 60 | 75 | 105 | 165 |
(1)试销期间,这个商场试销该商品的平均日销售利润是多少?
(2)试建立一个恰当的函数模型,使它能较好地反映日销售量
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210214-32257.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210214-82345.gif)
(3)如果在今后的销售中,该商品的日销售量与销售单价仍然满足(2)中的函数关系,试确定该商品的销售单价,使得商场销售该商品能获得最大日销售利润,并求出这个最大的日销售利润.
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210148-50945.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210149-41397.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210149-90654.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210149-19981.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210149-98810.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210149-41397.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210149-50298.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210150-39161.gif)
(1)判断函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210148-50945.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210149-41397.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210148-50945.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210150-14444.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210150-56380.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210149-41397.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210150-33688.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210149-41397.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210151-56490.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210143-97770.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210144-80347.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210114-44381.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210115-33322.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210115-16291.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210115-35266.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210115-23542.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210114-44381.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210115-91325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-49559.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-44862.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-24166.gif)
A.1 | B.5 | C.7 | D.9![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-49559.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-49559.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-49559.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-49559.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-49559.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-49559.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-49559.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-49559.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205210116-49559.jpg)
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