题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094414-90607.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094414-94952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094414-46469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094415-79053.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094415-53858.png)
(1)求数列的通项公式
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094415-72977.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094415-95876.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094415-24309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094414-46469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094415-95876.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094415-34753.png)
解析
(1)因为等差数列的定义可知
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094415-79053.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094415-53858.png)
(2)利用数列的前n项和的关系式,那么可知
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094416-97204.png)
解:(1)设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094416-15147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094416-66676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094416-38311.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094416-97204.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094417-33501.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094415-24309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094417-88353.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094417-68079.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094350-12449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094350-32595.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094350-45001.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094350-22104.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094351-20562.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094350-12449.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094351-77975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094351-49872.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094351-72368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094352-58701.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094326-78556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094326-83821.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094326-81581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094326-74783.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094313-20924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094313-93982.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094313-61320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094313-73702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094313-23040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094314-63644.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094314-13632.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094313-23040.png)
(2)求数列{
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094314-38098.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094313-93982.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094314-64712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094301-34331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094301-81173.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094301-76621.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094302-47171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094302-70869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094302-72101.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094248-85911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094248-86030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-55726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-60563.png)
(1) 证明数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-77051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094248-86030.png)
(2) 设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-82131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094250-61130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094249-82131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012094250-57459.png)
最新试题
- 1欧洲流经国家最多的河流是[ ]A.莱茵河B.易北河C.伏尔加河D.多瑙河
- 2辛亥革命后,“抵制洋货”“实业救国”的行动推动了中国民族资本主义的发展。这里主要抵制的是[ ]A.美国对中国的资
- 3函数f(x)在定义域R内可导,若f(x)=f(2-x),且当x∈(-∞,1)时,(x-1)·f′(x)<0,设a=f(0
- 4Spring is a good season to fly kites. You can fly your kites
- 5依次填入空缺处的句子是[ ]每逢深秋时节,____________,松竹山茶,色彩绚丽,美景尽览。 远眺群山环抱
- 6—____ can come in. I’m too busy to see ____. —Ok, I know.A.N
- 7下图所示钱币出自我国古代哪个历史时期?[ ]A.秦朝B.汉朝C.唐朝D.宋朝
- 8中国北京曙光公司研制出了第一款具有我国完全自主知识产权的高性能CPU芯片-“龙芯”1号。请回答以下问题:(1)“龙芯”(
- 9读“我国土地资源分布图”,回答1—2题。1、图例C所表示的土地资源主要分布的地形类型是[ ]A.平原B.盆地C.
- 10下列不属于秦末农民战争爆发原因的是[ ]A.赋税繁重B.刑法残酷C.徭役沉重D.土地兼并严重
热门考点
- 1“读史使人明智,读诗使人灵秀,数学使人周密,物理使人深刻,伦理学使人庄重,逻辑与修辞使人善辩。”培根的这一段话表明 [
- 2在如图所示,绳子得上端固定,下端拴着一个小球,小球在水平面内做匀速圆周运动.已知绳子长度为L,绳子转动过程中与竖直方向的
- 3【题文】中国某个朝代为避一位皇帝的讳,将“举秀才”改为“举茂才”。这位皇帝是A.汉高祖B.东汉光武帝C.隋炀帝D.宋太祖
- 4.在Rt△ABC中,∠C=90°,若a=6,b=8,则c= .
- 5下面四组函数中,f(x)与g(x)表示同一个函数的是( )A.f(x)=x2-1x+1,g(x)=x-1B.f(x)=
- 6某校进行化学实验考查时,教师给了同学们一小包黑色粉末,这种黑色粉末可能是氧化铜、炭粉或者是两者的混合物,让他们通过实验探
- 7世界近代史是一部资本主义制度产生、确立和不断发展的历史。某同学使用主题式学习方法复习这一主题。请根据所学知识,完成下列问
- 8宇航员在太空舱中,往往可利用自己呼出的二氧化碳粉与过氧化钠粉末作用获得所需的氧气,并合理处理呼出的二氧化碳(反应方程式为
- 9下图为某学生绘制的“中国民族资本主义经济发展曲线图”。该图中有一处明显错误,它是[ ]A.A——B段
- 10下左图为世界某区域示意图,右图为M地区气候资料图,图中山地M一侧的山坡为西侧。据此,回答1—2题。 1、关于图示地区的叙