题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88482.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-83080.png)
解析
试题分析:用一次函数图象上点的坐标特点,直线与y轴交点坐标为(0,
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
(
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-86044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-86044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
拆项法求其和即可,本题考查了一次函数图象上点的坐标特征、三角形的面积.
解答此题的难点是将
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
∵直线AB的解析式为:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88482.png)
∴当x=0时,y=
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
∴Sn=
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-86044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-86044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-86044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
∴S1+S2+S3+…+S2014=
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-86044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-86044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-16494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-16494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-46881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-46881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-60396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001710-13990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001710-69673.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-86044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-86044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001710-69673.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-86044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001710-72815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-83080.png)
故答案为:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-83080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001709-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001708-88753.png)
核心考点
举一反三
(1)求证:AC平分∠OAM;
(2)如果⊙M的半径等于4,∠ACO=300,求AM所在直线的解析式.
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001658-78130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001652-99646.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001652-99646.png)
A.1<x0<2 | B.0<x0<l | C.-l<x0<0 | D.-2<x0<-l |
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001634-73439.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001634-84171.png)
A.a >b>0 | B.a>k>0 | C.b=2a+k | D.a="b+k" |
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001635-84536.png)
A.直线x=1 | B.直线x=-2 |
C.直线x=-1 | D.直线x=-4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016001622-81273.png)
A.0个 | B.1个 | C.2个 | D.不能确定 |
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