题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102056-96068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102057-76844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102057-87457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102057-61336.png)
(1)写出明年第
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102056-96068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102057-52535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102056-96068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102058-66408.png)
(2)如果将该商品每月都投放到该地区
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102058-51563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102058-51563.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102058-31908.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102058-69919.png)
解析
试题分析:(I)利用
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102058-81201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102057-52535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102059-84202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102059-78362.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102059-33508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102057-61336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102059-82897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102100-66900.png)
试题解析:(I)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102100-96789.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102100-55795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102100-99139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102100-49409.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102059-33508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102101-86331.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102059-84202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102101-29552.png)
化简得
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102101-18332.png)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102102-71686.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102059-33508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102102-41981.png)
答:第
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102058-31908.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102058-66408.png)
(II)保证每月都满足供应,则
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102059-78362.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102059-33508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102057-61336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102102-43016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102102-74077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102102-86021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102058-69919.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102103-24727.png)
答:每月至少应投放
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102058-69919.png)
核心考点
试题【预计某地区明年从年初开始的前个月内,对某种商品的需求总量 (万件)近似满足:N*,且)(1)写出明年第个月的需求量(万件)与月份 的函数关系式,并求出哪个月份的】;主要考察你对函数的单调性与导数等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102049-42182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102049-98166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102049-22491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102034-57327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102034-45676.png)
(Ⅰ) 求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102034-71882.png)
(Ⅱ) 求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102034-33863.png)
(Ⅲ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102035-50626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102035-59851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102035-84416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102023-40176.png)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102023-55290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102024-12835.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102024-87215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102010-84467.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102010-43624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102010-25001.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102010-62915.png)
(2)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102010-18191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102011-97437.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102011-65509.png)
(3)令
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102011-60033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102011-65509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102011-86255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102011-68670.png)
若存在,求出
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102011-65509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102002-94134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102002-10285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102002-67308.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102002-21926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102003-61802.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102003-75070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102003-70636.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018102003-41369.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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