题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023539-66013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023539-87840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023539-33147.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023539-66013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023540-70188.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023540-23112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023540-58330.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023540-57711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023541-17770.png)
(Ⅲ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023541-13489.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023541-76759.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023541-73154.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023542-16275.png)
(3)根据
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023542-95614.png)
解析
试题分析:解:⑴
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023542-77395.png)
⑵
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023543-37335.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023543-75983.png)
⑶
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023543-74685.png)
而
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023544-57354.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023544-22771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023544-42294.png)
点评:解决该试题最重要的是第一步中通项公式的求解,利用等差数列的通项公式,得到数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023541-73154.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023412-35575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023412-66085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023412-23022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023412-25321.png)
设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023328-25078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023328-43813.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023328-94067.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023328-25078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023329-30959.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023329-75419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023329-15704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023329-57208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023330-35266.png)
(Ⅲ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023330-72602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023330-64952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023329-57208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023330-93068.png)
公差不为零的等差数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023234-86691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023235-56946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023235-76514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023235-53057.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023235-68224.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023234-86691.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023236-47790.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023236-47803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023236-92908.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023236-48944.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023157-92921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023157-86634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023157-25557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023158-10509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023158-12966.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023158-71688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023158-93951.png)
(I)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023159-33623.png)
(II)若对一切
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023159-48097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023159-31894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023158-10509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023142-77600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023142-56633.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023142-58437.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023142-83699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023143-13093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023143-99937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023143-55697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023143-54097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023143-14004.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023144-90175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023143-54097.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023142-77600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023144-52106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023144-73178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023144-33486.png)
(Ⅱ)若对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023145-76310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023145-79758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010023145-30507.png)
最新试题
- 1尿的形成过程包括 和
- 2命题P:“对于任意的实数x都有x2+x+1>0”的否定是______.
- 3一同学在斜坡上骑自行车,上坡速度为mkm/h,下坡速度为nkm/h,则上下坡的平均速度为( )A.2mnm+nkm/h
- 4已知,△ABC为等边三角形,点D为直线BC上一动点(点D不与B、C重合).以AD为边作菱形ADEF,使∠DAF=60°,
- 5使用动滑轮能 ,但不能 ,它实质上相当于一个动力臂是阻力臂 倍的杠杆,如果物重为20N,
- 6化学在生活中用途广泛,下列有关说法错误的是( )A.使用农药、化肥对人类有利也有弊 B.合理使用加碘盐有利于碘缺乏症病
- 7下列词语中加粗字的注音全都正确的一项是[ ]A.险巇(xī)B.踬踣(pèi)C.肇(zhào)造D.杌陧(n
- 8根据对话内容,选择适当的句子补全对话。A. think about the things that made you s
- 9已知在一份语文试卷中有四位不同的作者分别写了四篇不同的文章,题目要求答题者将作者与文章连线,每连对一组得2分,一名学生随
- 10电路元件A和B中的电流与两端电压的关系如图所示,由图可得A的电阻为______ Ω,若将A、B并联后接在电压为2V的电源
热门考点
- 1如图所示,为自行车的传动机构,行驶时与地面不打滑。a、c为与车轴等高的轮胎上的两点,d为轮胎与地面的接触点,b为轮胎上的
- 2本小题满分14分)数列满足.(Ⅰ)求的值;(Ⅱ)设求数列的通项公式;
- 3数据:1,2,2,3,5的众数是( )A.1B.2C.3D.5
- 4 2009 年 8 月,台风“莫拉克”袭击我国东南沿海,给人们的生命财产造成重大损失。图6为“我国东南沿海海面气压分布示
- 5若函数是奇函数,则
- 6992+2×99+1.
- 7下列天气符号所代表的天气,与适宜从事的体育活动的组合,正确的是A.—马拉松赛B.—高空跳伞C.—沙滩排球D.—帆船比赛
- 8若是一个二项式,则等于[ ]A.B.8C.-8D.-
- 9如图所示为两个交通标志牌,在不违反交通规则的前提下,从看到这两个标志牌的地方到达东山,假设汽车匀速行驶,则最快到达东山要
- 10阅读下列材料:材料一 据历史资料统计,明以前的洞庭湖区水灾平均83年一次,明代后期平均20年一次。……长江在晚清时期(1