题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190041-54568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190041-68032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190041-15363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190041-48965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190042-30670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190042-81838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190042-14905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190043-59987.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190042-30670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190043-23104.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190041-54568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190042-81838.png)
(Ⅱ)令
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190043-26621.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190044-57175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190044-56920.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190041-48965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190044-93089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190044-36048.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190045-76151.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190045-56729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190045-26560.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190045-46416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190044-36048.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190041-15363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190041-54568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190046-88405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190042-30670.png)
在数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190042-81838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190043-23104.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190042-81838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190046-18241.png)
∴数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190042-81838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190046-37845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190046-68330.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190046-57178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190047-31181.png)
(Ⅱ)∴
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190047-57016.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190047-35351.png)
由①-②,得
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190047-14973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190048-15976.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190048-46200.png)
不等式
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190044-56920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190048-76858.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190048-73070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190044-57175.png)
方法一、设
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190049-90768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190044-57175.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190049-44891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190049-78434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190049-44891.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190049-39734.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190050-65562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190050-60272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190050-44640.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190050-25549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190051-73376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190050-65562.png)
综上所述,实数λ的取值范围是
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190050-25549.png)
方法二、也即
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190051-61262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190044-57175.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190051-72725.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190051-30297.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190052-54351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190052-98774.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190050-44640.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190052-96448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190052-11081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190053-25334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190053-42865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010190050-25549.png)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185825-49805.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185825-91591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185459-96721.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185447-64239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185448-11950.png)
(1)求通项
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185447-64239.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185448-30640.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185448-16636.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185448-30640.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185403-52663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185404-45871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185404-97526.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185404-96447.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185404-89344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185405-60601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185034-96768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185034-96768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185034-76171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185034-78289.png)
(1)求数列{
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185035-38358.png)
(2)记
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010185035-39567.jpg)
最新试题
- 1已知函数f(x)=x2+ax-lnx,a∈R.(1)若函数f(x)在[1,2]上是减函数,求实数a的取值范围;(2)令g
- 2在海岸A处,发现北偏东45°方向,距离A(-1)n mile的B处有一艘走私船,在A处北偏西75°的方向,距离A 2 n
- 3(1)甲型流感病毒是导致人类感染禽流感的______,患有禽流感的家禽属于______,奋战在预防禽流感疫情蔓延一线的工
- 4我国1984年正式公布了《中华人民共和国森林法》,该法规定,植树造林、保护森林是______应尽的义务;各级人民镇府应当
- 5晋代何曾是晋武帝的老师,地位显赫,家产丰裕。但他的子孙不思进取,过着穷奢极侈的生活,不过三四十年时间,家道败落,成了盗贼
- 6下面依次填入横线处的词语,恰当的一组是[ ]①古诗中有许多惯用的意象,它们表达的_____已经约定俗成,如“杨柳
- 7对于锌、铜和稀硫酸组成的原电池(如下图),下列有关说法正确的是①Zn是负极
- 8读“二分二至日图”,回答问题: (10分)(1)(3分)当地球运行到C点时,地球的位置接近 (近日
- 9如果不等式ax>1的解集是x<1a,则( )A.a≥0B.a≤0C.a>0D.a<0
- 10____、____、____三种颜料按不同的比例混合,可以配成各种颜色的颜料,因此这三种颜料叫做颜料的三原色。
热门考点
- 1对比表中一组数字,完成下列各题。(1)请比较中国、俄罗斯、美国、印度四国在土地资源方面的差异。_____________
- 2第一次世界大战历时四年多,最终以哪个帝国主义军事侵略集团的失败而告终A.三国同盟B.三国协约C.轴心国集团D.反法西斯同
- 3读塔里木盆地图,回答。该地大部分聚落已移向地势高的地方,其原因主要是A.洪水泛滥B.荒漠范围扩大C.交通线增多D.坡地开
- 4爱因斯坦说:“我的精神生活和物质生活都依靠着别人(包括生者和死者)的劳动。我必须尽力以同样的份量来报偿我所领受了的和至今
- 5若不等式的解集为,则 ▲ .
- 6The last time we had a family reunion was ________ my brothe
- 7下列有关河流与湖泊的叙述,正确的一组是①我国最大的淡水湖是青海湖②我国最大的内流河是塔里木河③流向国外的河流称为外流河④
- 8初中生小敏经常利用课余时间练习小提琴,她希望自己不仅学习成绩优异,而且有演奏小提琴的一技之长。她的做法[ ]A、
- 9已知函数y=f(x)(x∈R)的图象如图所示,则不等式xf′(x)<0的解集为( )A (-∞,)∪(,2)
- 10目前,个体、私营经济创造的国内生产总值,已占我国全部国内生产总值的30%,东部沿海部分省市更是高达60%以上。这表明非公