题目
题型:不详难度:来源:
已知数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020402-52479.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020402-21247.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020402-58042.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020403-17721.gif)
数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020403-19943.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020403-57508.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020403-43028.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020404-22089.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020404-28059.gif)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020402-52479.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020403-19943.gif)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020404-47061.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020404-63835.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020402-21247.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020405-68222.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020405-25248.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020403-43028.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020405-54324.gif)
(Ⅲ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020405-35879.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020405-25146.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020406-84652.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020406-92013.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020406-91767.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020406-43492.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020406-22812.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020407-21077.gif)
而当
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020406-91767.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020407-69940.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020407-89976.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020403-57508.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020407-61115.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020403-19943.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020404-22089.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020404-28059.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020407-17405.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020408-46601.gif)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020404-47061.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020408-74213.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020408-22534.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020408-20021.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020409-40547.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020409-65014.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020409-31268.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020409-88589.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020405-68222.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020409-72735.gif)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020410-41212.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020410-46097.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020410-15764.gif)
(Ⅲ)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020405-35879.gif)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020406-92013.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020410-53301.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020411-64157.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020411-52825.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020406-92013.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020410-53301.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020411-17137.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020411-32379.gif)
综上,存在唯一正整数
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020411-52825.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020406-84652.gif)
解析
核心考点
试题【(本小题共13分)已知数列的前项和为,且.数列满足(),且,.(Ⅰ)求数列,的通项公式;(Ⅱ)设,数列的前项和为,求使不等式对一切都成立的最大正整数的值;(Ⅲ)】;主要考察你对等差数列等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020354-50916.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020355-58095.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020355-28797.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020355-92960.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020354-50916.gif)
A.![]() | B.1 | C.2 | D.3 |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020336-70222.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020337-14537.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020337-42756.gif)
A.2 | B.![]() | C.![]() ![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020321-30799.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020321-29309.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020321-36448.gif)
数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020321-30799.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020321-77164.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020321-29309.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020322-50037.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020322-47465.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020322-56625.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020322-23098.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020316-20708.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020316-75817.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020316-84411.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020316-74510.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020316-83512.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020317-84411.gif)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020316-20708.gif)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020316-20708.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020317-87615.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020317-70444.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020312-72553.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013020312-73442.gif)
( )
A.![]() | B.152 | C.156 | D.168 |
最新试题
- 1句型转换 (10分)小题1:Simon does well in swimming.(改成同义句)Simon ____
- 2丁苯橡胶的结构简式:合成这种橡胶的单体应是[ ]①②CH3-CH=CH-CH3 ③CH2=CH-CH=CH2 ④
- 3下列选项中不属于第一届中国人民政治协商会议内容的是 [ ]A.通过了《共同纲领》 B.制定了第一部社会主义类型的
- 4W、X、Y、Z为原子序数递增的四种短周期元素。W是原子半径最小的元素,X的一种核素在考古时常用来鉴定一些文物的年代,Y是
- 5当你上网时,发现有不健康的网页,正确的做法是[ ] ①自觉关闭该网页,不理会②关闭主机,永不上网 ③清除不健康的
- 6图中,ACB为晨昏线,C点位于格陵兰岛上,读图回答下列各题。小题1:飞机从A点飞往B点,最近的航线是A.从A点出发沿图中
- 7-- How are things with you, Bill? -- ______________ .A.You
- 8如图,B是线段AD的中点,C是BD上一点,则下列结论中错误的是( )A.BC=AB-CD B.BC=
- 9有人认为命由天定,因而身处困境时消极等待;也有人认为人定胜天,面对困难积极进取。生活中之所以有不同的处世方法是因为(
- 10If Tom ______ tomorrow, I"ll tell him the good news.A. come
热门考点
- 1A.goB.doctorC.posterD.old
- 2下列句子中划线的近义词选用恰当的一项是( )(1)事情办妥后,他心里很 ,说:“我这就去 一会。”(2)为了这张
- 3堵住打气筒的出气口,下压活塞使气体体积减小,你会感到越来越费力.其原因是( )A.分子间没有可压缩的间隙B.分子力表
- 4已知,a+b=4n+2,ab=1,若19a2+147ab+19b2的值为2009,则n=______.
- 52010年5月1日至20日的20天里,每天参观上海世博会的人数统计如下:(单位:万人次)20,22,13,15,11,1
- 6某兴趣小组利用下列装置进行O2、CO2实验室制法和有关性质的研究.(1)写出下列编号仪器的名称:①______,②___
- 7关于下列各装置图的叙述中,正确的是A.实验室用装置①制取氨气 B.装置②中X若为四氯化碳,可用于吸收氨气,并防止倒吸 C
- 8如图,已知AD是△ABC的边BC上的中线,△BME是△AMD绕点M按顺时针方向旋转180°得到的,连结AE,求证:DE=
- 9You must try some of her home made wine—it’s quite a(n)
- 10根据短文内容,从下面方框选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 The world is a