题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050509-20389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050509-36565.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050509-48156.png)
(Ⅰ)将函数
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050509-44297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050510-58470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050510-36084.png)
(Ⅱ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050510-70261.png)
(Ⅲ)已知命题:“函数
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050509-20389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050510-57910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050511-66497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050509-48156.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050511-51591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050511-96647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050511-15775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050509-20389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050512-98720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050512-32116.png)
解析
试题分析:(Ⅰ)将
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050512-45454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050510-58470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050512-66263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050513-27607.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050510-36084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050511-96647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050513-42135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050513-77573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050513-80797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050514-75654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050514-52033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050514-41745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050514-20982.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050514-64303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050511-15775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050515-34444.png)
试题解析:(Ⅰ)平移后图像对应的函数解析式为
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050511-51591.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050515-43165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050515-93962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050515-94299.png)
又由题设真命题知,函数
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050510-36084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050511-96647.png)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050510-70261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050509-36565.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050516-31677.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050513-42135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050516-44528.png)
由不等式
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050516-14688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050513-80797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050514-75654.png)
此时
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050514-52033.png)
任取
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050516-58243.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050514-41745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050514-20982.png)
所以函数
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050510-70261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050511-15775.png)
(Ⅲ)此命题是假命题.
举反例说明:函数
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050515-34444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050517-82684.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050510-57910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050511-66497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050509-48156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050517-48986.png)
修改后的真命题: “函数
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050509-20389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050512-98720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050512-32116.png)
核心考点
试题【已知真命题:“函数的图像关于点成中心对称图形”的充要条件为“函数是奇函数”.(Ⅰ)将函数的图像向左平移个单位,再向上平移2个单位,求此时图像对应的函数解析式,并】;主要考察你对两角和与差的三角函数等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050501-44521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050501-82951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050501-47362.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050501-84379.png)
(2)若边长c=2,解关于x的不等式asinx-bcosx<2。
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050404-13831.png)
(Ⅰ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050405-41355.png)
(Ⅱ)在△ABC中,若A为锐角,且
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050405-13926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050405-64168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050343-89825.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050343-51300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050344-97865.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050344-52395.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050344-99803.png)
(Ⅱ)在
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050344-26986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050345-72006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050345-97564.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050345-93795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050321-11188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050321-50433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050321-10866.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050321-43703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050322-32576.png)
(2)设函数
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050322-30003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050322-79707.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050322-30646.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050314-13548.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050314-94649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050314-71217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050315-51763.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050315-60004.png)
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