题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211404-40524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211404-71518.png)
等级 | 等级图标 | 需要天数 | 等级 | 等级图标 | 需要天数 |
1 | ![]() | 5 | 7 | ![]() ![]() ![]() ![]() | 77 |
2 | ![]() ![]() | 12 | 8 | ![]() ![]() | 96 |
3 | ![]() ![]() ![]() | 21 | 12 | ![]() ![]() ![]() | 192 |
4 | ![]() | 32 | 16 | ![]() | 320 |
5 | ![]() ![]() | 45 | 32 | ![]() ![]() | 1152 |
6 | ![]() ![]() ![]() | 60 | 48 | ![]() ![]() ![]() | 2496 |
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211405-41045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211405-15314.png)
答案
解析
试题分析:由表格知
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211405-47054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211406-24436.png)
核心考点
试题【某公司推出了下表所示的QQ在线等级制度,设等级为级需要的天数为,等级等级图标需要天数等级等级图标需要天数1577721289632112192432163205】;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/20191011/20191011211342-46334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211343-59944.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211343-84606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211343-61662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211343-84108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211350-37460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211350-99657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211350-31093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211350-98573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211351-75339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211351-10442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211351-42562.png)
(1)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211352-55929.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211352-22608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211352-97594.png)
(2)试证明对于数列
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211352-35192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211353-76950.png)
(3)若等差数列
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211342-46334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211353-60389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211353-97120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211353-76950.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211353-76950.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211136-93344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211136-63372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211136-51918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211136-43006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211137-65189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211137-42626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211136-51918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211137-84235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211136-51918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211136-93344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211137-82387.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211137-10022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211136-51918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211137-81751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211138-37532.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211136-51918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211138-91746.png)
(1)写出
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211138-51655.png)
(2)若生成数列
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211136-51918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211138-31429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211139-42612.png)
(3)证明:对于给定的
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211139-80374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211139-16347.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211139-96419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211027-34953.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211028-45556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211028-38941.png)
A.![]() | B.5或![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211003-65032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211009-79262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211010-64341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211010-62794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211010-71928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011211021-56523.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011210908-40284.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011210908-61330.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011210908-72262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011210919-20095.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191011/20191011210919-20034.png)
最新试题
- 1叶片的叶肉属于哪种组织[ ]A.输导组织B.保护组织C.基本组织D.分生组织
- 2The tall boy ______ you just met is my brother.A.whoB.whichC
- 3某种氯原子的质量为M kg,一个标准碳原子的质量为N kg,则这种氯原子的相对原子质量是( )A.M12B.12MNC
- 4检查视力时,人与视力表之间的距离应为5 m,现因屋子太小而使用了一个平面镜,视力表到平面镜的距离为3 m,那么,人到镜子
- 5Complete the following passage by filling in each blank with
- 6近年来,关于唐朝盛世的讨论成为我国文化领域中的一大热点。在唐代的长安,食胡食、穿胡服、跳胡舞,成为朝野的时尚。唐朝这种生
- 7下列句子没有语病的一项是[ ] A、通过健康教育节活动,让我们锻炼了生活能力,了解了健康知识,开阔了视野。B、
- 8阅读下面的文字,完成小题。中国文化如何走向世界葛剑雄要考虑中国文化如何走向世界,首先必须明确中国文化在世界文化中的地位。
- 9材料反映内容与哪一历史人物密切相关:A.林则徐B.左宗棠C.李鸿章D.曾国藩
- 10划分干湿地区的依据是[ ]A.降水量和蒸发量的对比关系B.降水量的多少C.地表的干湿程度D.蒸发量的多少
热门考点
- 1已知动点p(x,y)满足,,则动点p所表示的曲线长度为( )。
- 2We surveyed 300 young people on what they like to do at week
- 3图1是泰州某河上一座古拱桥的截面图,拱桥桥洞上沿是抛物线形状,抛物线两端点与水面的距离都是1m,拱桥的跨度为10m,桥洞
- 4关于我国天气现象与其成因的组合正确的是[ ]A.东南沿海夏季的台风———反气旋B.冬季爆发的寒潮———冷锋C.长
- 5下图表示细胞免疫过程中X细胞对靶细胞的***伤过程,其中能够产生X细胞的是[ ]A.B细胞B.效应B细胞C.T细胞D
- 6Mary is often heard ________ playing piano in the next room
- 7已知函数f(x)=x3+bx2+cx+d有两个极值点x1=1,x2=2,且直线y=6x+1与曲线y=f(x)相切于P点.
- 8材料一:据估计,目前全世界核弹头总数约为22000枚,其中近8000枚处于可发射状态。美、俄两国各有2000枚可进行即时
- 9We still gave the boy another chance ______he made some mist
- 10下列各组顺序的排列不正确的是( )A.沸点:HBr>HCl>HFB.热稳定性:HCl>H2S>PH3C.酸性强弱:H3