题目
题型:不详难度:来源:
已知点(1,
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003235-82326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003235-45652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003236-84945.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003236-90705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003236-70012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003236-26121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003237-82543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003237-54457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003237-25028.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003236-70012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003237-28963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003237-87336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003238-55341.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003236-90705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003237-82543.png)
(2)若数列{
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003238-83826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003236-70012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003238-17865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003238-17865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003238-76644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003236-70012.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003239-18474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003239-92449.png)
(2) 112
解析
试题分析:(1)依题意
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003239-77332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003239-15551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003240-98911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003240-24627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003240-52708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003240-16818.png)
又数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003241-46056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003241-89154.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003241-77360.png)
又公比
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003241-53088.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003239-18474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003242-90415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003242-26111.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003242-36900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003242-51073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003243-98437.png)
数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003243-72553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003243-36018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003243-89143.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003238-55341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003244-42566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003244-52140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003244-71686.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003239-92449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003242-90415.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003244-87023.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003245-67168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003245-90650.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003245-74359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003245-22510.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003245-74476.png)
点评:根据已知的数列的求和与其通项公式的关系式来求解数列的通项公式,并能结合裂项法求和,属于基础题。
核心考点
试题【(本小题满分14分)已知点(1,)是函数且)的图象上一点,等比数列的前项和为,数列的首项为,且前项和满足().(1)求数列和的通项公式;(2)若数列{前项和为,】;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/20191010/20191010003230-52638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003230-14370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003231-63815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003231-85222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003211-92681.png)
(1)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003212-46246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003212-66519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003212-80879.png)
(2)若关于
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003212-79944.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003212-76703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003213-80480.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003213-92671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003213-31446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003213-23945.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003113-12380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003114-51507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003114-60602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003114-74653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003114-44956.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003101-18089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003102-18030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003102-10234.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003102-76621.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003102-53006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003103-73579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003103-68024.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003103-49676.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003104-75251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003104-61488.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003104-86797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003104-86797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003104-55593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003104-47135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003104-86797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010003104-55593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010002944-68029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010002944-31054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010002944-68029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010002944-63493.png)
A.7 | B.15 | C.20 | D.25 |
最新试题
- 1-的绝对值是[ ]A.B.-C.-2D.2
- 2两圆x2+y2=r2与(x-3)2+(y+1)2=r2(r>0)外切,则r=( )A.B.C.D.5
- 3若ab=34,则a+bb=______.
- 4假定一定时期内流通中实际需要的货币量为1000亿元,而货币的发行量增加到2000亿元,此时1元纸币只相当于0.5元货币的
- 5设集合,,则有( )
- 6一列正弦横波在x轴上传播,a,b是x轴上相距Snb=6m的两质点,t=O时,b点正好振动到最高点而a点恰好经过平衡位置向
- 7给出四个函数分别满足:①f(x+y)=f(x)+f(y); ②g(x+y)=g(x)•g(y);③u(x•y)=u(x)
- 8Morpho蝴蝶的翅膀在阳光的照射下呈现出闪亮耀眼的蓝色光芒,这是因为光照射到翅膀的鳞片上发生了干涉。电子显微镜下鳞片结
- 9定义在实数集上的函数f(x)是单调减函数,且满足f(x)+f(﹣x)=0,如果有f(1﹣m)+f(1﹣m2)<0,求m的
- 10(经典题)一组数64个分成八个小组,从第一小组到第四小组的频数分别为5,7,11,13,第五小组到第七小组的频率都是0.
热门考点
- 1在蔬菜生产过程中,常喷洒农药防治病虫害.据有关专家介绍,用碱性溶液或清水浸泡,可使残留在蔬菜上的农药的毒性降低,因此,买
- 2纯水中存在电离平衡:H2OH++OH-欲使该平衡向正方向移动,且c(H+)增大,应加入的物质是 [ ]A.NaH
- 3下列物质能共存于同一溶液中,且无色透明的是A.NaOH、NaNO3、K2SO4B.CuSO4、MgSO4、KClC.Ba
- 4下列各式正确的是[ ]A.B.C.-(-3)=3D.
- 5 励志中学在“世界读书日”到来之际拟召开首届“诵读经典”活动的动员会。请你根据要求完成下面各题。(1)为这次动员会会场
- 6关于Na2CO3和NaHCO3性质的说法不正确的是( )A.二者的水溶液均显碱性B.二者均与盐酸反应放出CO2气体C
- 7【题文】已知三个正整数x,y,z的最小公倍数是300,并且,则方程组的解(x,y,z)=
- 8补出下列各句的空缺部分。(8分)(1)鹰击长空,___________________,________________
- 9如图,矩形的长为6,宽为3,O为其对称中心,过点O任画一条直线,将矩形分成两部分,则图中阴影部分的面积为( )A.9B
- 10设O为坐标原点,,若向量的夹角与的夹角相等,则实数的值为 ( )A.B.C.D.