题目
题型:不详难度:来源:
数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233719-31617.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233719-32709.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233719-20341.gif)
(1)请在
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233719-31617.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233720-80547.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233720-31779.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233720-53698.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233720-36952.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233720-80547.gif)
(2)数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233721-88160.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233721-41388.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233721-88160.gif)
答案
(1)8
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233721-68875.gif)
解析
(1)由题可得
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233721-19852.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233722-32108.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233722-75412.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233722-68941.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233721-68875.gif)
核心考点
举一反三
数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233710-47358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233710-81871.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233711-95339.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233711-90980.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233711-94127.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233711-91864.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233711-60769.gif)
(3)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233710-47358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233712-90297.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233656-55987.png)
若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233656-40290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233656-50399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233641-98736.gif)
(1)求证:数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233641-43538.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233641-81726.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233641-28156.gif)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233642-53770.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233642-56273.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233642-38938.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233642-29106.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233643-53613.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233626-52001.png)
如果把上述数组中的括号都去掉会形成一个数列:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233627-71095.png)
则此数列中的第
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233627-34702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233627-96047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233627-94497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233628-60934.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233628-21380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233628-46543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233628-81728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233629-15802.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233629-57332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233606-68378.gif)
已知数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233606-65593.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233606-19953.gif)
(Ⅰ)李四同学欲求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233606-65593.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233606-28477.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233606-10985.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233607-87952.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233607-83154.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233607-92497.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233608-68178.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233608-23475.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233606-65593.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233608-40173.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233606-65593.gif)
(Ⅱ)记
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233608-69963.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233608-24572.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233609-12634.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012233609-49788.gif)
最新试题
- 1写出一个没有实数根的一元二次方程:( )。
- 2下列各反射活动中,属于条件反射的是( )A.风沙进眼流泪B.膝跳反射C.望梅止渴D.缩手反射
- 3绿色植物通过光合作用将光能储藏在( )A.叶绿体B.氧气C.水D.有机物
- 4The girl _____ a smile on her face is always kind _____ othe
- 5下列叙述中正确的是 [ ]A.CO2、SO2、Al等其水溶液或本身虽能导电但都是非电解质B.电解质在电流作用下才
- 6下图为某人绘制的北京2013年10月空气质量统计图。读图回答下列各题。小题1:大风天后数日内常为空气质量优良天,与北京1
- 7***在《沁园春-长沙》里有这样一段描写:“鹰击长空,鱼翔浅底,万类霜天竞自由”.其中涉及的动物运动方式有( )A.飞
- 8小明有一支量程适当的温度计,插入热水后立即拿出来读数,请指出他操作中的两处错误:(1)______;(2)______.
- 9已知,,那么的值为( )A.B.C.D.
- 10温度是用来表示物体的______的物理量.水银温度计是利用液体的______性质制成的.
热门考点
- 1请选择下列形似字注音组词有误的一组[ ]A.供gōng 供给 拱gǒng拱桥 B.洨xiáo洨河
- 2用 NA表示阿伏加德罗常数的值,下列说法正确的是( )A.5.6 g铁粉在0.1mol氯气中充分燃烧,转移的电子数
- 3今年年初,我国南方地区的冰冻雪灾牵动了全国人民的心.(1)雪灾中,电线覆冰导致断线.若某地相邻两电线杆间某根电线的自重为
- 4补写出下列句子的上句或下句。(10分,每小题2分。任选5小题)小题1:吾所以为此者,_______________ 。
- 5“资产阶级创造了伟大的生产力,推动了社会的进步,同时也产生了自己的掘墓人——无产阶级。……共产党人就是领导无产阶级推翻资
- 6There _____ a lot of coal mines in the south, but many of th
- 7下列成语来源于我国历史上第一次大规模的农民起义的是[ ]A.问鼎中原B.纸上谈兵C.揭竿而起D.草木皆兵
- 8若A=3x-2,B=1-2x,C=-5x,则A•B+A•C=______.
- 9(15分)如图所示,两带有等量异种电荷的平行金属板M、N竖直放置,两板间的距离d=0.4m,现将一质量m=1.0×10-
- 10If you had come here earlier, the work_______ yesterday.A.wo