题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084829-42203.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084830-50319.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084830-11427.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084830-90585.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084830-95835.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084830-90768.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084831-16823.gif)
(1)直接写出点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084831-16497.gif)
(2)动点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084831-99776.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084831-16497.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084831-89844.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084831-98123.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084832-71814.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084832-61663.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084832-22399.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084832-71132.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084833-41282.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084831-99776.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084833-48712.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084833-95310.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084833-98992.gif)
过点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084833-98992.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084834-73671.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084834-89115.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084834-42858.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084833-41282.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084834-25661.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084831-16497.gif)
将
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084835-89622.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084830-11427.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084830-95835.gif)
得
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084835-68341.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084835-65285.gif)
∴抛物线的解析式为:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084835-10613.gif)
(2)在
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084835-28032.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084836-26177.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084836-38854.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084836-54838.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084836-58381.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084837-79173.gif)
∴点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084833-98992.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084837-56265.gif)
∴点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084834-42858.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084837-48966.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084837-75009.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084838-47033.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084838-55789.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084838-81507.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084834-25661.gif)
解析
核心考点
试题【(本小题满分12分)如图,在平面直角坐标系中,已知矩形的三个顶点、、.抛物线过两点.(1)直接写出点的坐标,并求出抛物线的解析式;(2)动点从点出发,沿线段向终】;主要考察你对二次函数定义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084818-46413.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084818-43853.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084818-53487.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084818-86040.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084818-64164.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084818-60060.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084818-97764.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084818-91933.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084818-54469.gif)
(1)求这条抛物线的函数表达式.
(2)已知在对称轴上存在一点P,使得
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084819-71255.gif)
(3)若点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084819-37713.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084819-58058.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084819-42724.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084818-53487.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084819-86524.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084819-86393.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084819-42323.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084819-90136.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084820-70646.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084820-50519.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084820-26935.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084820-26935.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084820-70646.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084820-26935.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084809-82934.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084802-55453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084803-83741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084803-24805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084803-49288.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
则y1,y2,y3从小到大用 “<”排列是 __________ .
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084754-25364.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084754-36116.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084755-24322.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019084755-36024.jpg)
(1)请写出抛物线的开口方向、顶点坐标、对称轴.
(2)请求出球飞行的最大水平距离.
(3)若王强再一次从此处击球,要想让球飞行的最大高度不变且球刚好进洞,则球飞行路线应满足怎样的抛物线,求出其解析式.
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