题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133555-14417.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133556-81939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133556-60177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133556-94945.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133556-56964.png)
A.25 | B.27 | C.50 | D.54 |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133557-32575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133557-25265.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133557-81145.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133557-78527.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133558-18407.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133558-11263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133558-65422.png)
核心考点
举一反三
设等比数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133543-28475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133543-24116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133543-99181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133544-51109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133544-28203.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133543-28475.png)
(Ⅱ)在
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133544-79013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133544-59264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133544-30486.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133545-72875.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133543-24116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133545-96278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133531-67762.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133531-50077.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133531-67762.png)
(2)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133531-40307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133532-85615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133532-16948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133532-90398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133531-40307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133515-53878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133515-59120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133515-45905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133516-43097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133516-59166.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133515-53878.png)
(Ⅱ)是否存在正整数
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133516-78628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133516-77144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133515-53878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133516-78628.png)
对于数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-54398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-89037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-43175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-43499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-61585.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-54398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-89037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-89037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-54398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-11631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-54398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133452-71988.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133452-19861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133452-51574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133452-89521.png)
(1)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-30808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-42225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-43499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-57291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-22165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-30808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-76984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-30808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133454-50902.png)
(2)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-30808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-43175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133454-88350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133454-80151.png)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133454-55962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-30808.png)
②若
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133455-47108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-30808.png)
(3)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-30808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133455-90978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-43499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133455-86565.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133455-25097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133453-30808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-43175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133454-88350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133456-28545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133451-43499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133456-65697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133456-28545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133456-69789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133435-90897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133435-92641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133435-97718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133435-46432.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012133436-81412.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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