题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211306-27659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211307-92661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211307-73873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211307-21685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211308-14365.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211308-58657.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211308-36742.png)
解析
试题分析:由图象可知函数在
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211307-73873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211308-59952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211307-92661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211309-77169.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211309-48494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211309-88495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211309-78743.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211308-36742.png)
点评:解决此类问题,要综合运用函数的性质,画出函数的图象,灵活解决问题.
核心考点
举一反三
(1)写出图1表示的市场售价与时间的函数关系式
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211255-62267.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211255-71862.png)
(2)认定市场售价减去种植成本为纯收益,问何时上市的西红柿纯收益最大?
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211256-76594.jpg)
(注:市场售价和种植成本的单位:元/百千克,时间单位:天)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211241-37661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211241-20696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211241-21813.png)
(1)函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211242-62918.png)
(2)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211242-13320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211242-51371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211242-44047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211243-84315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211156-13465.png)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211157-93929.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211157-48633.png)
(Ⅱ)如果
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211157-16855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211157-44712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211158-61680.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211117-78451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211118-69843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211118-51377.png)
(1)根据图象,求一次函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211119-88680.png)
(2)设公司获得的毛利润(毛利润=销售总价-成本总价)为S元,
①求S关于
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211117-78451.png)
②求该公司可获得的最大毛利润,并求出此时相应的销售单价.
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211059-91155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211059-86185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211059-48955.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211100-81086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211100-27154.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211059-86185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211059-48955.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211059-91155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211059-91155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211100-83405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211101-81361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211101-49055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211101-37635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211102-36032.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211102-91350.png)
(2)讨论
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211101-49055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211101-37635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204211102-36032.png)
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