题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175305-40832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175306-17402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175306-57700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175306-54650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175306-97594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175307-12791.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175308-10135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175306-97594.png)
(1)若命题
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175308-25962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175308-54608.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175305-40832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175308-27779.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175305-40832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175308-27779.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175308-54608.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175308-32272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175309-91699.png)
解析
试题分析:(1)若命题T为真命题,则
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175309-67101.png)
(2)若P为真 ,则c<1;若Q为真,则c="0," 或者
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175309-98598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175309-91152.png)
若P为真,Q为假时,则
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175309-49463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175310-29641.png)
若P为假,Q为真时,则
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175310-71910.png)
所以C的取值范围为
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175309-91699.png)
点评:中档题,本题综合性较强,全面考查复合命题真值表,对数函数的性质,二次函数的图象和性质。解题的关键之一,是认识到
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175305-40832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175308-27779.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175305-40832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175308-27779.png)
核心考点
试题【设命题:函数在上为减函数, 命题的值域为,命题函数定义域为(1)若命题为真命题,求的取值范围。(2)若或为真命题,且为假命题,求的取值范围.】;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/20200204/20200204175252-53947.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175252-96554.png)
(Ⅰ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175252-31428.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175252-41225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175253-53283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175231-80041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175232-93273.png)
(Ⅰ)求实数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175232-62656.png)
(Ⅱ)判断函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175232-94375.png)
(Ⅲ)若对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175232-86531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175233-76644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175233-59459.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175221-80082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175221-64264.png)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() ![]() |
(Ⅰ)当a=-2时,求不等式f(x)<g(x)的解集;
(Ⅱ)设a>-1,且当x∈[
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175205-30146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204175206-72786.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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