题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225636-57957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225636-99302.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225636-38635.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225636-81169.png)
解析
试题分析:根据题意,由于等差数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225636-57957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225636-99302.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225637-82247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225637-13071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225637-33723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225636-81169.png)
点评:本试题主要是考查了等差数列和等比数列的通项公式的运用,属于基础题。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225622-94829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225623-44182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225623-78159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225623-17527.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225623-50763.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225622-94829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225624-16613.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225624-54684.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225624-27869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225514-73128.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225514-70578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225514-20447.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225514-83703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225515-59683.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225515-76582.png)
(1)证明{
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225515-59899.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225515-37354.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225514-20447.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225418-33087.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225418-81319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225419-56997.png)
(1)求证数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225419-19065.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225419-55184.png)
(3)数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225419-48750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225420-88780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225420-93170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225420-50190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225420-73554.png)
(1)步长可以人为地设置成
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225343-56509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225344-71674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225344-52674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225344-82307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225344-65612.png)
(2)发令后,机器人第一步立刻迈出设置的步长,且每一步的行走过程都在瞬时完成;
(3)当设置的步长为
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225345-73753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225345-73753.png)
则这个机器人跑
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225345-41828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225345-41828.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225327-96249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225327-59159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225327-50130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225328-33262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225327-59159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225328-74371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225328-31341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225327-59159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225328-86119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009225327-59159.png)
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