题目
题型:解答题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010034-22841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010034-22841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010035-47550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010035-77448.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010035-77448.png)
(2)画出函数
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010035-21665.png)
(3)当函数
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010035-96056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010035-13041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010035-79175.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010036-90787.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010036-59080.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010036-49498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010036-73911.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010036-18192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010037-66779.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010037-24340.png)
(2)画图像4分,(其中图形3分,规范1分)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010036-90787.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010037-25579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010038-67452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010038-99766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010038-33780.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010038-93344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010038-88652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010039-32804.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010035-77448.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010039-64992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010038-88652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010039-57389.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010036-49498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010038-88652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010039-87338.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010035-77448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010039-57389.png)
此时
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010039-28051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010040-97822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010040-77495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010040-29077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010040-83217.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010040-33100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010040-56263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010041-96058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010041-70650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010041-33712.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010040-83217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010041-17724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010041-33712.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010041-66707.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010042-36753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010038-88652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010035-77448.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010040-33100.png)
解析
核心考点
试题【(本题满分14分)如图4,是边长为2的正三角形,记位于直线左侧的图形的面积为. (1)求函数解析式; (2)画出函数的图像;(3)当函数有且只有一个零点时,】;主要考察你对分段函数等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010032-49952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010033-95488.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010032-49952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010033-57604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010033-35220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010033-17824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010033-86327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010029-13350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010029-85409.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010029-93378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010029-31894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010030-33293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010029-31894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010030-84935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010030-25368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010030-63771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010026-63452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010026-93931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010022-16487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010022-25225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010023-66083.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010023-27255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010023-88752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010023-83074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010023-12478.png)
A.2 | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010019-31913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010019-12253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010019-72407.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010019-78451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010020-45013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010020-34659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010020-41636.png)
A. -1 | B. -2 | C. 2 | D. 1 |
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