题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055103-10757.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055103-50608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055103-72195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055104-80420.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055104-31062.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055104-87188.png)
(1)证明{
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055104-62533.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055105-76485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055103-72195.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055104-87188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055105-84899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055105-29769.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055105-74888.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055105-18771.png)
解析
试题分析:解:(1)由
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055104-87188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055105-84899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055105-29769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055111-19780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055111-94591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055111-55874.png)
(2)由
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055105-84899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055112-44855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055112-49811.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055112-32633.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055105-18771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055105-74888.png)
点评:本试题考查了等比数列的定义以及数列的通项公式与前n项和的关系的运用,属于基础题。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055043-42875.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055043-16891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055044-46260.png)
(1)求证数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055044-21814.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055044-31050.png)
(3)数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055044-10784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055044-32681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055045-36184.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055045-20020.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055045-90864.png)
(1)步长可以人为地设置成
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055033-88187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055033-88405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055033-86147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055033-94384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055033-51805.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/20191012/20191012055034-11318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055034-11318.png)
则这个机器人跑
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055034-55934.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055034-55934.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055026-30053.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055027-14235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055027-88086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055027-53794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055027-14235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055027-23097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055028-26415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055027-14235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055028-93750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055027-14235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055018-23739.jpg)
第六行的最大的数字是 ;设第
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055018-60514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055018-44208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055019-50768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055002-57942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055002-38841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055002-53476.png)
(1)求证:数列{
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055002-13827.png)
(2)求数列{
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055002-57942.png)
(3)设数列{
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055002-57942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055002-94490.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055003-38294.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012055003-51825.png)
最新试题
- 1在等式3x-2y2=0,x2+y2=1,y=x,y=|x|,x=|y|,y是x的函数的有( )A.1个B.2个C.3个
- 2我国第一部纪传体通史是:A.《汉书》B.《史记》C.《春秋》D.《诗经》
- 3My name is Mary. I have a good friend Lily. In some ways,we
- 4构成我国地形骨架的是( ) A.高原B.平原C.山脉D.丘陵
- 5某种分子的球棍模型如图所示(图中球与球之间的连线可代表单键、双键、三键等),黑球代表碳原子,对该物质的判断正确的是A.①
- 6复数A.B.C.D.
- 7材料一:2010年12月20日,以“领先科技,共创未来”为主题的第八届广州国际汽车展览会在羊城正式开幕,作为2010年最
- 8在25℃时,将两个铜电极插入到一定的Na2SO4饱和溶液中,通直流电电解并不断搅拌,当阴极上收集到a mol的气体的同时
- 9若点A的坐标为(6,3),O为坐标原点,将OA绕点O按顺时针方向旋转90°得到OA",则点A"的坐标为______.
- 10某专卖店专销某种品牌的电子产品,进价12元/只,售价20元/只.为了促销,专卖店决定凡是买10只以上的,每多买一只,售价
热门考点
- 1计算:(能简便计算用简便方法)(1)(-20)+(+3)-(-5)-(+7);(2)|16-17|+|17-18|+|1
- 2下表为我国三个城市1990—2008年不同地区人口增长状况,读表回答5~6题1.表中的三城市近郊地区人口增长迅速,其主要
- 3我国科学家运用基因工程技术,将苏云金芽孢杆菌的抗虫基因导入棉花细胞并成功表达培育出了抗虫棉。下列叙述不正确的是[
- 4There are about ____________ students in our school.A.four t
- 5(本小题满分8分)按右图所示的流程,输入一个数据x,根据y与x的关系式就输出一个数据y,这样可以将一组数据变换成另一组新
- 6下列粒子:①分子②原子③电子④原子核⑤质子⑥中子⑦离子,带正电的是______,带负电的是______,不显电性的是__
- 7一列简谐波在x轴上传播,波速为50m/s. 已知 t=0时刻的波动图象如图 (1)所示,图中x=5m处的质点此时正经过平
- 8设△ABC的三边分别为a,b,c,在命题“若a2+b2≠c2,则△ABC不是直角三角形”及其逆命题中有( )A.原命题
- 9请根据下表回答有关问题,除(2)题外其余各小题均用序号填空。序号①②③④物质醋酸水熟石灰纯碱化学式CH3COOHH2OC
- 10下列哪 一种疾病可被称为“现代文明病”( )A.急性传染病B.肺结核C.脑血管疾病D.呼吸系统传染病