题目
题型:单选题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193841-24678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193842-93023.png)
A.0<![]() | B.-1≤![]() | C.![]() | D.![]() |
答案
解析
试题分析:由函数
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193841-24678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193842-23234.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193842-74392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193842-42351.png)
核心考点
试题【已知函数内是减函数,则 ( )A.0<≤1B.-1≤<0C.≥1D.≤-1】;主要考察你对正弦函数的图象与性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193804-43111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193804-57911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193805-53438.png)
A.![]() | B.![]() | C.1 | D.0 |
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193746-37119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193746-47647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193747-59329.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193658-67763.png)
![]() | ![]() | 0 | ![]() | ![]() | ![]() | ![]() |
![]() | 0 | 1 | ![]() | 0 | ![]() | 0 |
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193700-96426.png)
(2)若在
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193700-18601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193701-46439.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193701-96272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193651-34491.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193651-73455.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193651-73455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193652-13657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193652-34057.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193652-95809.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193512-81921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193512-14444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193512-19521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193513-32536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193513-10240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193513-84754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193513-59714.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193514-49328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193514-43518.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193514-10853.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190901/20190901193514-40146.png)
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