题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000619-12127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000620-34211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000620-98118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000620-32496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000620-36356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000621-45021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000620-36356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000620-34211.png)
(1)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000621-70667.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000620-34211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000620-36356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000621-72517.png)
(2)对(1)中的
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000620-36356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000621-80179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000621-64058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000622-63540.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000622-38933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000622-47302.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000622-53520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000623-92650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000622-53520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000623-92650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000623-52134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000623-51791.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000623-52134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000621-64058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000623-35389.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000623-29639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000624-88200.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000624-77384.png)
解析
试题分析:(1)本题实质是求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000624-67800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000624-56961.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000625-95910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000625-99224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000625-99224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000625-39536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000625-62745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000626-55495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000626-17370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000626-20612.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000626-34114.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000626-19498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000627-44824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000627-32233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000622-47302.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000622-47302.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000627-41995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000627-71180.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000628-67255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000628-12663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000621-64058.png)
试题解析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000628-43698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000628-47434.png)
(2)不等式化为:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000629-66721.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000629-97238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000629-76368.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000629-14024.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000629-50758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000630-69019.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000630-56158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000630-92550.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000630-94408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000631-75797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000624-88200.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000622-47302.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000631-80750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000631-71792.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000631-43597.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000631-37712.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000632-67703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000632-42822.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000632-67248.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000622-47302.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000632-30448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000632-88318.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000633-74619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000633-41061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000632-67703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000633-22433.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000624-77384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000621-64058.png)
核心考点
试题【由函数确定数列,.若函数能确定数列,,则称数列是数列的“反数列”.(1)若函数确定数列的反数列为,求;(2)对(1)中的,不等式对任意的正整数恒成立,求实数的取】;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/20191012/20191012000612-48667.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000612-51589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000613-69953.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000613-95685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000613-32487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000506-13678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000506-83980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000507-86070.png)
(1)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000506-13678.png)
(2)证明:数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000506-13678.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000507-53184.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000507-51324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000507-86070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000507-31250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000508-51469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000508-82163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000506-13678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000439-40018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000439-27801.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000424-53235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000424-10964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000424-65275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000424-21089.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000424-53235.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000425-53005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000425-17849.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000357-69528.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000357-62034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000358-95807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000358-90147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000358-90681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012000358-26620.png)
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