题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122641-36407.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122641-20405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122642-70148.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122642-36213.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122642-98871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122642-49494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122642-90746.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122641-36407.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122643-42868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122643-42868.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122643-42339.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122643-86961.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122643-42868.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122643-82149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122644-99062.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122644-42893.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122644-51022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122644-44597.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122645-76167.png)
②-①得
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122645-91560.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122645-10858.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122645-47630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122646-15030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122645-47630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122643-42339.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122646-99211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122646-95083.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122646-46416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122646-62680.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122647-27144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122647-67584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122647-60535.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122623-12047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122623-38724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122623-68784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122623-44092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122610-91144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122610-55309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122610-63743.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122610-58991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122550-91318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122550-56899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122551-92196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122532-51796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122533-55324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122533-62448.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122532-51796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122533-55324.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122533-95463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122533-13540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122509-16076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122509-33480.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122510-46155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012122510-87821.png)
A.45 | B.54 | C.52 | D.108 |
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