题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002825-25120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002825-14654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002826-11399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002826-78152.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002826-76485.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002826-94844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002826-16284.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002827-57582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002827-68718.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002827-59275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002827-68888.png)
解析
试题分析:(1)要证
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002828-75860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002828-78709.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002827-59275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002828-99432.png)
再令
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002828-26061.png)
试题解析:由(1)知
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002828-75860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002825-14654.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002829-70309.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002827-59275.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002829-64882.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002829-60382.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002829-31282.png)
两式相减得:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002830-81866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002830-67604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002830-73071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002830-73396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002827-68888.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002716-54213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002716-82915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002716-65885.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002716-41858.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002717-23573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002717-78654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002717-93435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002717-12061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002718-20821.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002533-96794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002533-18356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002533-32042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002533-46327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002534-72558.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002511-39018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002511-61734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002511-98782.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002511-59677.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002511-44846.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002511-75741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002512-11821.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002512-33250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002512-48845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002434-10705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002434-52882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002434-31020.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002434-14598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002434-11615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002435-37059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009002435-15294.png)
A.![]() | B.![]() | C.![]() | D.![]() |
最新试题
- 1HClO是比碳酸还弱的酸,反应:Cl2+H2OHCl+HClO达平衡后,要使HClO浓度增加,可加入 A.H2S(气
- 2 如果若干个函数的图象经过平移后能够重合,则称这些函数为“互为生 成”函数。给出下列函数:
- 3某学生用注射器和弹簧秤来测大气压强,已知注射器的活塞横截面积为S,实验有以下步骤:A.读出初状态气体的体积V1B.将活塞
- 4 Wang kun : Have you looked at a map? Wang wei : What did yo
- 5阅读下面的文字,完成小题。中国必须吃透世界金融的诡谲高盛一名高管反水,近日发表公开信斥责高盛血液里“有毒的贪婪”,将客户
- 62008北京奥运会已圆满结束,其成就让世人瞩目,中国代表团参加了包括田径、体操在内的所有28个大项的比赛,下列几种奥运比
- 7法定节假日安排要有利于弘扬和传承民族文化,要让我们的节日更“文化”,需大力发展文化产业,而允许非公有资本进入文化产业是解
- 8某市建设城市轨道交通线路方案公示后,很多市民通过打电话、写信、上访和网络评议等方式参加意见,对原方案进行调整修改,最后获
- 9如图所示为实验室温度计的示意图,它的最小刻度是1℃,此时它所示的温度是___ ℃.
- 10有人说赞美是人生历程中的加油站,而批评是人生历程中的维修站,一个人不能总是维修,但要不断加油!不断加油,他就学会了自信。
热门考点
- 1在△ABC中,∠A=80°,∠B=30°,则∠C等于( )A.60°B.70°C.80°D.90°
- 2在谈到人大工作时,有人指出说:“人大工作是集体有权,个人无权。”这主要是说 [ ]A.人大代表实际上没有个人权利
- 3The book ___ three yuan, but it only ___ me two yuan.A.spend
- 4某单位有职工100名,按他们的年龄分成8组,在40~42(岁)组内有职工32名,那么这个小组的频率是[ ]A.0
- 5血液的过滤器是( )A.心脏B.脾脏C.肝脏D.肾脏
- 6 这个学期,从哈尔滨转来一个同学—小丽,同学们问她哈尔滨是什么样子的,她说:“我们那里一到冬天,河面上就结了
- 7下列知识结构中,正确的是( )A. 摩擦 方法 增大变滑动为滚动 缠绕 减小 变滚动为滑动使接触面分离
- 8读“2006年11月7日(立冬)我国大陆部分各地季节状况图”,回答1—2题:小题1:形成图中我国各地在同一天出现有三种季
- 9如图,点A、O、E在同一直线上,∠AOB=40°,∠COD=28°,OD平分∠COE。(1)求∠COB的度数(2)求∠A
- 10【题文】函数的定义域为,若且时总有,则称为单函数。例如,函数 是单函数。下列命题:① 函数是单函数;② 指数函