题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235815-44729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235815-54868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235815-81872.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235816-10844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235816-35076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235816-87561.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235816-25222.png)
(Ⅰ)求证:数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235817-59292.png)
(Ⅱ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235816-87561.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235817-44553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235817-35441.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235817-74298.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235817-59292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235815-44729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235818-92795.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235818-12448.png)
解析
试题分析:解:(Ⅰ)由已知可得,
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235817-74298.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235818-10378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235818-92795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235818-22659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235818-55044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235819-35169.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235819-75676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235818-12448.png)
点评:解决的关键是能结合数列的定义来证明等差数列或者等比数列,同时能结合裂项法思想求和,属于基础题。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235803-89713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235804-17129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235804-39247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235804-43690.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235804-64288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235805-40143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235805-57045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235805-83045.png)
A.5 | B.4 | C.3 | D.2 |
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235655-47470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235656-43107.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235656-81596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235656-41979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235656-25074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235657-98974.png)
A.13 | B.21 | C.34 | D.55 |
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235544-37438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235544-28760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235544-69409.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235544-60086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235544-47597.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235544-69409.png)
A.最大值31 | B.最小值31 | C.最大值63 | D.最小值63 |
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235428-54104.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235428-29736.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235428-50085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235428-49732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235429-37527.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235429-59042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235356-85257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235357-33676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235357-50422.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235357-55618.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235357-85427.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235358-58400.png)
有
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235358-41662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009235358-18364.png)
最新试题
- 1已知x,y满足不等式组y≤xx+y≥2x≤2,则z=2x+y的最大值与最小值的比值为( )A.12B.43C.32D.
- 2下列有关元素及其化合物知识说法正确的是[ ]A.在常温下铜与浓硝酸反应,说明硝酸只有氧化性 B.铵盐加热都能分解
- 3把一副三角板如图所示放置:图(1)中∠α与∠β的关系是______,图(2)中∠α与∠β的关系是______.
- 4 阅读下面三幅漫画,回答问题: (1)你认为他们应该选择哪种方式来行使建议权?除此之外,还可以采取哪些方式
- 5读“等高线图”,完成下列各题. (1)写出图中字母所代表的地形部位名称:A______,B______,C______.
- 6下列关于速度的说法正确的是( )A.速度描述物体位置变化的快慢,速度大表示物体位置的变化大B.平均速度.v=△x△t,
- 7已知(1-x3)2013=a0+a1x+…+a2013x2013,则3a1+32a2+…+32013a2013=( )
- 8沙漠植物细胞中,占细胞干重含量最高的成分是[ ]A.蛋白质B.脂肪C.核酸D.水
- 9下列命题正确的是 [ ]A.两个全等的三角形一定相似B.两个直角三角形一定相似C.两个等腰三角形一定相似D.如果
- 10已知抛物线C1:,点F(1,1)。(Ⅰ)求抛物线C1的顶点坐标; (Ⅱ)①若抛物线C1与y轴的交点为A,连接AF,并延长
热门考点
- 1在消防知识中有一个词叫做“物理性爆炸”,是指在没有发生化学反应的情况下发生的爆炸,下列各项描述中属于物理性爆炸的是A.煤
- 2已知点点分别是轴和轴上的动点,且,动点满足,设动点的轨迹为E.(1)求曲线E的方程;(2)点Q(1,a),M,N为曲线E
- 3材料一 1978年一2013年我国粮食产量结合材料一,分析改革开放35年来我国粮食生产总体呈现增长态势的原因。(9分
- 4i是虚数单位,i1+i=( )A.12+12iB.-12+12iC.12-12iD.-12-12i
- 5人生当自强。一个自强的人会对未来充满希望和憧憬,能自我激励,积极进取。下列同学们的做法有助于培养自强品质的是[
- 6下列熟语中有错别字的一项是A.大气候省油灯呼之即来,挥之即去顺天者存,逆天者亡B.大手笔势利眼虎生三子,必有一彪士别三日
- 7下列离子方程式正确的是( )A.澄清的石灰水与稀盐酸反应Ca(OH)2+2H+=Ca2++2H2OB.碳酸氢钙溶液跟稀
- 8下列有关材料的说法错误的是( )A.橡胶都是人工合成材料B.棉花、羊毛都是天然纤维C.涤纶、腈纶是合成纤维D.商场购
- 9如图所示是用弹簧测力计测小瓶所受浮力的示意图,由图中数据判断,小瓶重力为 N,
- 108点20分,钟表上时针与分针所成的角是______________度。