题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181751-64587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181752-96164.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181752-39996.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181752-47220.png)
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181752-25042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181753-67731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181753-20490.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181753-20490.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181753-68866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181753-92488.png)
核心考点
试题【如果()那么共有 项.】;主要考察你对数列的概念与表示方法等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181249-22782.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181250-93431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181250-59829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181250-60915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181250-13371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181251-97954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181251-62502.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181251-67076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181251-87519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181251-71559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181252-12294.png)
(1)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181252-32015.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181250-13371.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181252-15156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181252-47257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181253-98203.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181253-55517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181250-59829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181250-60915.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181253-83388.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181249-22782.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181250-59829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181250-60915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181213-92221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181213-76305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181213-42829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181213-65222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181214-83948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181214-53901.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181213-92221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181214-59977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181213-65222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181214-44289.png)
(Ⅲ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181215-83080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181215-29864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181213-76305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007181215-15444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180915-57374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180916-33532.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180916-23165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180916-97467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180916-51079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180915-57374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180917-65959.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180917-49071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180917-39119.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180915-57374.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180917-90161.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180916-33532.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180918-24157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180918-86713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180750-44073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180751-36706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180751-10378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180649-36328.png)
①当a=5时,数列{xn}的前3项依次为5,3,1;
②对数列{xn}都存在正整数k,当n≥k时总有xn=xk;
③当n≥1时,xn>
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180650-63977.png)
④对某个正整数k,若xk+1≥xk,则xk=[
![](http://img.shitiku.com.cn/uploads/allimg/20191007/20191007180650-63977.png)
其中的真命题有________.(写出所有真命题的编号)
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