题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032206-68617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-42955.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-14739.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-39600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-63021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-42816.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-14739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032208-12964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032208-69821.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-42816.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032208-83983.png)
解析
试题分析:(1)先利用辅助角公式将
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-14739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032208-52761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032208-66835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032209-64809.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-14739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032209-53493.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-14739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032209-52782.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-42816.png)
试题解析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032209-36253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032210-54450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032210-22123.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032209-53493.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032210-50372.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032210-58981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032211-50435.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032211-63440.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032211-31229.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032211-61356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032211-32001.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032211-63440.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032212-55847.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032212-38803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032207-63021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032212-55507.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032201-73191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032152-56724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032153-55061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032153-86009.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032153-63045.png)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032153-92606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032153-59640.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032153-92606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032154-54163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032154-98727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032154-22863.png)
(1)试分别建立出厂价格、销售价格的模型,并分别求出函数解析式;
(2)假设商店每月购进这种商品m件,且当月销完,试写出该商品的月利润函数;
(3)求该商店月利润的最大值.(定义运算
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032142-72258.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032132-23463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032132-13922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032133-95473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032133-32890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032133-43417.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032133-18870.png)
A.2 | B.3 | C.4 | D.5 |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032123-44232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032124-51276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032124-65462.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032124-36359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032124-41292.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032124-57838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032125-20799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032125-41881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032125-33544.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032125-80796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020032126-69646.png)
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