题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021906-42517.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021906-23224.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021906-23224.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021906-45206.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021907-72639.jpg)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021907-23782.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021907-46785.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021907-50323.gif)
(2)数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021907-46785.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021907-71492.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021908-40846.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021908-56898.gif)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021908-48505.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021908-48859.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021907-71492.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021909-36486.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021909-28453.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021909-52229.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021909-98066.gif)
解析
解:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021909-33240.gif)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021910-53160.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021910-91144.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021910-91301.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021910-81449.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021911-59020.gif)
设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021911-82112.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021911-22846.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021911-38588.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021911-76998.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021912-88147.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021912-73640.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021912-18141.gif)
(3)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021912-65745.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021913-87247.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021913-50658.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021913-78970.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021913-32453.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021909-28453.gif)
核心考点
试题【(本题满分13分)在平面直角坐标系上,设不等式组所表示的平面区域为,记内的整点(即横坐标和纵坐标均为整数的点)的个数为(1)求;并求数列的通项公式;(2)数列的】;主要考察你对等差数列等知识点的理解。[详细]
举一反三
设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021847-47736.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021847-27874.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021848-91905.gif)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021847-47736.gif)
(2)令
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021848-69604.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021848-19715.gif)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021848-97509.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021848-61821.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021849-72529.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021849-21783.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021849-26017.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021849-15486.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021834-58692.gif)
第1行 1 1
第2行 1 0 1
第3行 1 1 1 1
第4行 1 0 0 0 1
第5行 1 1 0 0 1 1
…… ………………………………………
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021825-37792.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021825-91834.gif)
垃圾量为
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021825-25514.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021819-84181.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021819-26344.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021819-72939.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021814-40258.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021814-25167.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013021815-75946.gif)
A.![]() ![]() | B.![]() | C.![]() ![]() | D.![]() |
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