题目
题型:不详难度:来源:
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![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185630-61608.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185631-63471.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185631-41283.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185631-45285.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185631-75309.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185632-90991.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185632-71595.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185632-77158.gif)
(2)若a,b均为负整数,且
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185632-77158.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185632-56588.gif)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185632-90991.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185632-71595.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185632-41570.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185633-79474.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185633-49269.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185631-75309.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185633-67214.gif)
由题意得:
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185633-12679.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185633-30479.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185633-79474.gif)
(2)由于
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185634-95829.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185634-51169.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185634-37013.gif)
由
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185633-79474.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185634-99936.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185635-26964.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185635-62116.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185633-49269.gif)
(3)令
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185635-19987.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185635-47307.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185635-39687.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185636-95230.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185636-54338.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185636-60657.gif)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185636-23631.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185636-33442.gif)
即:
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185637-23774.gif)
核心考点
试题【) 已知函数(a<0, ,设关于x的方程的两根为,的两实根为、. (1)若,求a,b关系式(2)若a,b均为负整数,且,求解析式(3)若<1<<2,求证:<7】;主要考察你对函数的相关概念等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185616-15737.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185616-47595.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185617-80469.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185616-47595.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185617-29049.gif)
(1)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185616-47595.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185617-75076.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185617-95724.gif)
(2)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185616-47595.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185617-75076.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185618-34876.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185617-75076.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185618-58905.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185618-61944.gif)
(3)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185616-47595.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185618-22123.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185618-34876.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185618-22123.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185619-90974.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185619-29012.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185545-10880.gif)
(1)试判断
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185546-89372.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185546-93207.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185546-74861.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185546-91639.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185547-45512.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185516-14084.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185516-10263.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185516-23137.gif)
(1)利用这个性质证明
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185516-60286.gif)
(2)设A、B、C是函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185517-80152.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185510-33204.png)
[0,1]上最小值为0,则
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185510-33204.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185502-44047.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205185502-29198.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
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