题目
题型:不详难度:来源:
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043658-83625.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043658-14227.gif)
(2)已知数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043658-62891.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043658-29820.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043659-27853.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043658-62891.gif)
(3)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043659-36615.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043659-29308.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043659-40042.gif)
所以设S=
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043659-45729.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043700-54810.gif)
S=
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043700-85949.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043700-10279.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043700-38398.gif)
(2)由
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043659-27853.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043700-41975.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043701-24124.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043701-95942.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043701-13487.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043701-27621.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043702-81103.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043659-29308.gif)
(3)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043702-87608.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043702-82025.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043702-60623.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043702-83103.gif)
>
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043703-76033.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043638-20619.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043638-32606.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043638-36226.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043639-18236.gif)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043638-32606.gif)
已知曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043622-36617.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043622-27306.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043622-76255.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043623-61718.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043623-47211.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043623-69151.gif)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043623-10679.gif)
(2)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043623-66250.gif)
工作年限 | 方案甲 | 方案乙 | 最终选择 |
1 | 1000 | 600 | 方案甲 |
2 | 2000 | 1200 | 方案乙 |
≥3 | | | 方案甲 |
(1)他这样计算增资总额,结果对吗?如果让你选择,你会怎样选择增资方案?说明你的理由;
(2)若保持方案甲不变,而方案乙中每半年末的增资数改为a元,问:a为何值时,方案乙总比方案甲多增资?
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043550-49929.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043550-89285.gif)
(1)求证数列{bn}是等差数列;
(2)求数列{an}的通项公式.
设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043530-58162.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043530-13541.gif)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043530-44956.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043530-89579.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043531-74071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043531-62065.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043531-71522.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043531-77981.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043531-60255.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043532-85406.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043532-45027.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043532-47708.gif)
(Ⅱ)若每个数
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043532-47708.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013043532-21241.gif)
最新试题
- 1阅读下表和材料,回答下列问题。(1)依据上表,可以判断出我国目前的城市化处于_________________。(2)下
- 2下图是市场上常见的两种燃料电池示意图下列有关电池电极a、b、c、d的叙述正确的是 [ ]A.电极a为正极,电极反
- 3阅读下列材料:材料一 从18世纪初开始,英国商人向中国输入鸦片,每年约有500箱鸦片流入英国,而运到中国的鸦片有两万箱,
- 4--- Would you mind closing the door? It’s really too cold. -
- 5世界三大宗教创立的先后顺序是①基督教 ②佛教 ③伊斯兰教A.①②③B.
- 6设a2+2a-1=0,b4-2b2-1=0,且1-ab2≠0,则(ab2+b2-3a+1a)5=______.
- 7He didn"t go home _______ he finished his homework. [ ]A
- 8老子说:”大直若屈,大巧若拙,大辩若讷”。这启示我们A任何事物都具有两面性B要透过现象认识事物的本质C对立统一是是事物的
- 9社会关注近日,中国青少年研究中心公布了一项历时十年的中国少年儿童发展状况调查报告。在同伴关系方面,调查结果显示:网络日益
- 10【题文】钱穆《国别新论》中说:“汉代宰相是首长制,唐代宰相是委员制。”这反映的实质问题是 A.汉代宰相位高权重B.唐代宰
热门考点
- 1He didn"t realize he had forgot his bag _____ the plane had
- 2国务院法制办将《职工带薪年假规定(草案)(征求意见稿)》授权新华社全文公布,广泛征求社会各界意见。各界可以登陆政府网站、
- 3设函数f(x)是周期为4的奇函数,当-2≤x≤0时,f(x)=x(1-2x),则f(92)的值为______.
- 4要观察细胞等人眼无法直接看见的物体应选 镜;要观察遥远的天体应选用 镜;要
- 5The notice came around two in the afternoon the meeti
- 6一个样本有5个数据,各数据与样本平均数的差依次是-1,-2,0,1,2.那么这个样本的标准差是( )A.0B.2C.2
- 7边长为L的正方形金属框在水平恒力F作用下运动,穿过方向如图所示的有界匀强磁场区域。磁场区域的宽度为d(d>L)。已
- 8I have been consistently opposed to feeding a baby regularly
- 9计算:tan230°+2sin60°+tan45°.sin30°-tan60°+cos230
- 10函数y=sin(12x+3)的最小正周期是______.