题目
题型:解答题难度:简单来源:不详
(1)试写出该种服装实际售价
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014955-88673.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014955-59307.gif)
(2)在每件实际售价高于50元时,购买者一次购买多少件,加工厂获得的利润最大?
(利润=销售总额-成本)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014955-59307.gif)
则由题得:
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014956-95987.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014956-13895.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014956-30576.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014956-13711.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014956-27448.gif)
最大利润为当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014957-33266.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014957-25996.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014957-64615.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014957-79295.gif)
最大利润为当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014957-36301.gif)
答:当购买者一次购买75件时,加工厂获得的利润最大,为1125元.
核心考点
试题【某服装加工厂对外批发某种服装,生产成本为每件40元,对外批发价定为每件60元.该加工厂为了鼓励零售商大批量购买,推出优惠政策:一次购买不超过50件时,只享受批发】;主要考察你对分段函数等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014948-98624.gif)
①函数
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014948-98624.gif)
②对于任意
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014948-73264.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014948-69873.gif)
③对于满足条件
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014948-68938.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014949-43838.gif)
(1)证明:对于任意的
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014949-77858.gif)
(2)证明:于任意的
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014949-57343.gif)
(3)不等式
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014949-66820.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014944-81512.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014945-24101.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014945-47347.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014945-89660.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014945-48193.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014945-12616.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014946-78619.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014946-62228.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014946-25702.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014946-64264.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014946-45155.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014941-58489.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014941-86616.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014942-37561.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014937-31825.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014933-39345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818014934-62863.png)
A.2 | B.1 | C.0 | D.-1 |
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