题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025559-67900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025559-41771.png)
⑴在同一坐标系内作出它们的图象;
⑵求出它们的交点
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025559-94952.png)
⑶求出这两条直线与
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025559-29007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025600-25445.png)
答案
⑵
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025600-31019.png)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025600-21145.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025559-94952.png)
⑶
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025600-64600.png)
答:这两条直线与
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025559-29007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025600-40045.png)
解析
(2)将两函数组成一个方程组后求得方程组的解即可求得交点的坐标;
(3)求得函数与x轴的交点坐标即可求得线段BC的长,A点的纵坐标即为三角形的高,据此可以求得三角形的面积.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-28359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-85759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-68239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-78222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-28359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-68239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-78222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-85759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-68239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-78222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-68239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-78222.png)
⑴设
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-28359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-68239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-18723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-28359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-47171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-85759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-48732.png)
①写出
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-47171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-48732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-18723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-18723.png)
②试讨论
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-28359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-85759.png)
⑵考虑到
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-85759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-85759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025551-28862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025534-97140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025534-59808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025534-97140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025534-59808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025534-97140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025534-59808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025534-97140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025534-73796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025535-21032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025534-59808.png)
⑴求船在静水中的速度和水流的速度;
⑵求甲、乙两人相遇的时间和距
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025534-97140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025535-58999.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025519-35800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025519-40103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025519-20687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025520-36284.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025520-67818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025519-20687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025520-83850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025520-84009.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025520-83850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025520-81347.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025519-35800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025519-20687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025521-18505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025521-55069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025521-18505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025521-55069.png)
⑴点
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025520-67818.png)
⑵如图1,若点
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025521-18505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025521-87573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025520-83850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025521-32261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025521-71851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025521-32261.png)
⑶如图2.若以点
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025521-18505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025522-51837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025522-51837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025522-46403.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025522-26920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025522-26920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025522-16981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025522-16981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025522-21720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025516-65106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025516-87028.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025516-83809.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025509-42997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025509-45404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025510-44229.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025510-56084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025510-38771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025510-81935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025510-66698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025510-26074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025510-70617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025510-86377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025511-44380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016025511-92605.png)
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