题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084402-21589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084402-15557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084402-22949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084402-48227.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084403-42850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084403-44453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084403-97893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084403-48439.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084402-15557.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084403-97893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084402-22949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084404-37878.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084404-41280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084404-78405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084405-45162.png)
解析
(1)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084402-21589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084402-15557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084402-22949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084402-48227.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084403-42850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084403-44453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084403-97893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084403-48439.png)
(2)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084405-50379.png)
解:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084404-41280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084404-78405.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084405-50379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084405-10224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084405-12083.png)
两式相减,得
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084405-52578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084406-38923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084405-45162.png)
核心考点
举一反三
A.11×(1.15-1)a亿元 | B.10×(1.15-1)a 亿元 |
C.11×(1.14-1)a 亿元 | D.10×(1.14-1)a亿元 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084351-52792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084351-65230.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084352-34660.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084351-52792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084352-53401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084352-22445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084347-36220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084347-36116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084347-20663.png)
A.33 | B.72 | C.84 | D.189 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084333-49385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084333-57062.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084333-45045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084333-79958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084333-60423.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084334-24369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084334-25150.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084334-52514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084334-70133.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084335-89616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084335-22393.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084335-26520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084335-66277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084327-27197.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084327-69748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084327-73064.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084328-22406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014084328-71913.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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