题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040057-24809.gif)
(Ⅰ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040057-68694.gif)
(Ⅱ)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040057-68694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040057-95870.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040057-95870.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040057-12188.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040058-62654.gif)
答案
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040058-40071.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040058-23852.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040058-18569.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040059-23864.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040059-13673.gif)
∴函数
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040057-68694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040058-40071.gif)
(Ⅱ)∵
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040059-24439.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040059-70358.gif)
∴当
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040100-32006.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040100-68914.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040100-15034.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040100-30830.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040101-61102.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040101-83400.gif)
由题意,有
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040101-67314.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040058-23852.gif)
核心考点
试题【(12分)已知函数.(Ⅰ)求函数的最小正周期;(Ⅱ)若函数在[-,]上的最大值与最小值之和为,求实数的值.】;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/20190914/20190914040051-58244.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040051-31251.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040052-72379.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040047-39230.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040047-78018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914040048-51289.png)
已知
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035907-51810.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035907-50979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035907-93965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035907-19260.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035908-98096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035908-89326.png)
(I)若点
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035908-84419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035908-84568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035907-93965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035909-57718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035909-49307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035909-29544.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035909-20622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035909-93764.png)
(II)当
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035910-50610.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035907-93965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035910-22047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035859-64923.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035859-50846.gif)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035859-30037.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035859-36503.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035900-47939.gif)
已知:
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035850-48630.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035850-14924.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035851-33325.gif)
(1)化简
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035851-73665.gif)
(2)在△ABC中,
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035851-48338.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035851-16910.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035852-64622.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035852-65272.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914035852-60028.gif)
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