题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030828-44041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030828-66574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030828-29457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030828-24529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030829-73145.png)
(1)试比较M、P、Q的大小;
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030829-83700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030829-73145.png)
(3)记函数
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030829-69013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030829-73977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030830-70467.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030830-23038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030830-24598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030830-22007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030831-63546.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030831-41846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030831-49569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030831-26981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030832-84427.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030832-56037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030832-46117.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030831-41846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030832-85035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030832-56037.png)
解析
试题分析:(1)两两之间作差比较大小;(2)根据第(1)问的结果结合等差数列项的关系求解;(3)先求出线段长
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030830-70467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030832-47155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030830-22007.png)
试题解析:(1)由
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030833-40962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030833-83165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030833-29398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030833-82694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030834-32912.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030834-11891.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030834-21106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030833-83165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030834-97227.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030831-41846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030834-11198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030831-49569.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030831-26981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030835-47449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030832-84427.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030832-56037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030835-41269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030832-46117.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030831-41846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030835-67773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030835-66906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030835-55798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030836-40919.png)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030836-50606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030836-24811.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030832-56037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030847-14897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030847-21074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030835-55798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030847-37850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030829-83700.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030848-29496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030829-73977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030848-33081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030848-91396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030835-55798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030848-29496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030848-61342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030848-72651.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030849-18378.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030849-45770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030849-28688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030849-54495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030850-30806.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030850-65844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030850-85458.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030850-13971.png)
核心考点
试题【设,,Q=;若将,lgQ,lgP适当排序后可构成公差为1的等差数列的前三项.(1)试比较M、P、Q的大小;(2)求的值及的通项;(3)记函数的图象在轴上截得的线】;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/20191012/20191012030813-48740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030814-48877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030814-43519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030814-88928.png)
A.36 | B.35 | C.34 | D.33 |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030804-99178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030805-96465.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030805-90277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030805-11947.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030659-90377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030709-32562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030710-29773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030710-38285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030711-65657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030711-52356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030659-90377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030711-10325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030710-29773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030712-91465.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030712-29963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030645-54070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030646-57885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030646-63182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030646-79353.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030645-54070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030646-57885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030645-54070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030646-48691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012030646-38614.png)
则下列结论中错误的是( )
A.若![]() ![]() |
B.若![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() ![]() |
D.![]() ![]() ![]() |
(I)若a1=1,S10= 100,求{an}的通项公式;
(II)若Sn=n2-6n,解关于n的不等式Sn+an>2n
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