题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094248-85911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094248-86030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-55726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-60563.png)
(1) 证明数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-77051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094248-86030.png)
(2) 设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-82131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094250-61130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-82131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094250-57459.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094250-33924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094250-63340.png)
解析
(1)因为函数
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094248-85911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094248-86030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-55726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-60563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094250-14423.png)
可知得到数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-77051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094248-86030.png)
(2)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-82131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094250-61130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-82131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094250-57459.png)
解:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094251-99163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094251-18103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094251-19136.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094251-43499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-77051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094252-22419.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094252-55331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094252-36417.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094252-22537.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094233-23232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094234-50189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094234-76849.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094234-32660.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094234-67987.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094223-43810.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094223-97418.png)
A.3或![]() | B.3或![]() | C.3 | D.![]() |
已知
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094201-11328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094201-90837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094201-41923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094201-90837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094202-41106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094202-28354.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094202-31677.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094203-39768.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094202-28354.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094203-59678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094203-69969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094203-23005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094204-75850.png)
已知公差不为零的等差数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094154-11399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094154-41174.png)
(Ⅰ)求通项公式
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094154-14389.png)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094154-18553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094155-84327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094155-57465.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094155-21676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094123-98333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094123-89198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094124-37590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094123-98333.png)
的前100项和为( )
A.2600 | B.2550 | C.2651 | D.2652 |
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