题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094533-11425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094533-23123.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094533-96011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094533-12065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094534-79766.png)
(1)求一次函数的解析式;
(2)设一次函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094533-96011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094534-76349.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094534-74108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094534-32468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094535-99964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094535-76708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094534-32468.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094535-44445.png)
解析
试题分析:解:(1)把点
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094533-12065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094535-10512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094536-20263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094536-59880.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094536-27704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094536-34429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094536-34429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094533-96011.png)
得
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094536-66894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094537-39726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094536-27704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094535-44445.png)
(2)在函数关系y=2x–2中, 令
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094537-85900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094537-96459.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094536-27704.png)
设一次函数的图像与
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094535-99964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094537-52729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094538-45605.png)
又设
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094538-78317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094538-74781.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094538-69257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094538-79111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094539-56213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094539-63975.png)
∴P1(–1,0),P2(3,0)
点评:本题难度中等,主要考查学生对一次函数及反比例函数知识点的掌握,为中考常考题型,要求学生培养数形结合思想,牢固掌握解题技巧运用到考试中去。
核心考点
试题【如图,在平面直角坐标系中,函数的图象与一次函数的图象的交点为.(1)求一次函数的解析式;(2)设一次函数的图象与轴交于点,若是轴上一点,且满足的面积是4,求点的】;主要考察你对反比例函数定义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094527-52940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094527-84969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094527-52940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094527-84969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094527-84969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094527-74175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094528-33033.png)
A.①②③ B.①②④ C.①③④ D.②③④
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094519-36485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094520-18759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094520-34773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094520-62828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094520-11657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094520-48254.png)
A.2 B.3 C.4 D.6
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094513-24036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094514-46177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094514-40362.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094514-61450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094514-86318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094515-92811.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094507-13328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094507-86877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094507-23001.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094507-54151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094507-94340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094508-77359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094508-79021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094507-13328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094507-94340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094508-14203.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094508-65272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094508-19743.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094508-20553.png)
(1)求反比例函数和一次函数的解析式;
(2)观察图象,请写出在
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094508-14203.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094508-15161.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094509-81463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094458-27659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094458-69811.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094459-51469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094459-49776.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094459-96490.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094459-86311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094500-97652.png)
(2)“
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094458-69811.png)
(3)如果小长方形中
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094500-97652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017094500-14722.png)
求其相邻边长的范围.
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