题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024427-42183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-19756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-62142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-28299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-62142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-34112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-35311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-75247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024429-72383.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024427-42183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-35311.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024429-39053.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024429-58600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-19756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024429-60068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024429-88776.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024430-87351.png)
解析
试题分析:(1)应用
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024430-66430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-28299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024440-68550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024441-92560.png)
试题解析:(1)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-28299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-62142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-34112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024441-49826.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024441-75602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024441-81195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024442-36649.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024442-94300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024442-38649.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024442-16795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024442-93821.png)
∴数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024427-42183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024442-36649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024443-62422.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024443-24664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024443-52267.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-35311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024443-36175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024444-35641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024444-17273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024444-39679.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024444-67824.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024445-27030.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024445-91822.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024445-86124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024445-51142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024445-27134.png)
∴数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024446-61371.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024446-23526.png)
综上所述,
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024429-88776.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024428-19756.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024346-27229.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024347-74266.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024347-24563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024347-46383.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024347-11403.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024347-80249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024346-27229.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024346-27229.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024347-24563.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024348-84398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024348-55090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024348-97048.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024348-65007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024348-88656.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024349-32183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024332-27366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024332-84132.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024333-90176.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024333-64512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024333-96931.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024332-27366.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024333-12399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024333-38291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024314-48197.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024315-71994.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024315-90445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024315-46685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024315-41536.png)
A.11 | B.16 | C.20 | D.28 |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024245-86090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024246-39656.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024246-93846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024246-80213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024246-13953.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024245-86090.png)
(2)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024246-77462.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024246-70372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024247-78619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024247-48648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024246-93846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024247-20728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024209-36979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024210-66081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024210-50629.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024210-67190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024210-88026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012024210-17024.png)
A.90 | B.100 | C.110 | D.120 |
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