题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075040-13487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075040-86728.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075040-75079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075040-13487.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075041-95819.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075044-90653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075045-99385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075045-95886.png)
解析
试题分析:(1)由
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075045-94241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075045-66042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075045-61571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075046-15162.png)
(2)猜想
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075045-95886.png)
证明:①当
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075046-85102.png)
②假设
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075046-60893.png)
则当
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075046-92215.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014075047-57053.png)
因此,由①②知猜想成立。 14分
点评:应用数学归纳法时,要严格遵守数学归纳法的证题步骤,尤其是第二步一定要用上归纳假设,否则不是数学归纳法.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074951-54765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074951-59011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074951-86319.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074944-38704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074945-19846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074945-74031.png)
(I)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074945-95677.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074944-38704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074945-79695.png)
(II)设
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074945-70799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074946-52928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074934-89352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074935-51334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074935-31363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074935-21408.png)
A.![]() | B.4 | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074930-57093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074930-18916.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074930-73949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074931-92191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014074931-84090.png)
A.8 | B.9 | C.4 | D.![]() |
最新试题
- 1Computers in offices and homes since 1970s.A.wasB.h
- 2(7分)家用电冰箱主要用于冷藏或冷冻食品。(1)冷藏室中照明灯和电冰箱压缩机是 (串/并)联。(2)利用电冰箱制
- 3---___________________? ---He’s a headache.A.What’s the m
- 4小练笔。 《盲孩子和他的影子》运用了丰富的想象、幻想和夸张来塑造人物形象,反映生活,对儿童进行思想教育。请你也来塑造一
- 5In my opinion, the view Jennifer _____ the other day is well
- 6 He ______ at 6:00 in the afternoon.A.get homeB.gets to home
- 7根据句意及首字母(汉语)的提示,补全单词.1. I w if he can come to my b
- 8下列疾病中,属于遗传病的是( )A.白血病B.白化病C.疟疾D.细菌性痢疾
- 9如图所示,一矩形线圈用细线吊起来,其中一边位于蹄形磁体中。(1)闭合开关,线圈向右摆动,断开开关后,再次闭合,线圈再次向
- 10我国南方传统民居的屋顶坡度较大,主要是为了( )A.便于接受更多阳光B.便于雨水下泻C.便于空气流通D.便于更快散热
热门考点
- 1从波斯湾运石油至美国,走最便捷的路线,沿途经过的水域有:A.霍尔木兹海峡、阿拉伯海、曼德海峡、红海、地中海、直布罗陀海峡
- 2读图,回答下列问题。(1)说出图中海拔在200米以下区域的地理环境特征。(2)说出郑州附近黄河的主要水文特征及其成因。(
- 3漫画告诉我们①依法签订劳动合同是维护劳动者合法权益的重要依据②依法签订劳动合同有利于维护劳动者的合法权益③当自己的权益受
- 4同学们总结了氧气和二氧化碳的实验室制法,并利用下列装置进行练习和拓展.Ⅰ、知识总结:【反应原理】用氯酸钾和二氧化锰混合加
- 5下列做法中属于关爱集体的是[ ]①班集体需要小刚出墙报,他牺牲了星期天的时间把墙报的具体内容设计好②为办好元旦晚
- 6已知向量= (-3 ,2 ) , ="(x," -4) , 若//,则x=( )A.4B.5C.6D.7
- 7一个多项式加上得到,则这个多项式是___________.
- 837. Stop! If you go any _____, you will be in danger..A.farB
- 9You can see _____ sunine _____ sky. [ ]A. a, the
- 10为了研究水的沸腾,小丽观察了水在加热过程中温度随加热时间的变化情况,并记录了有关数据如下表:时间/min01234567