题目
题型:不详难度:来源:
A.先向左平移2个单位,再向下平移3个单位 |
B.先向右平移2个单位,再向下平移3个单位 |
C.先向左平移2个单位,再向上平移3个单位 |
D.先向右平移2个单位,再向上平移3个单位 |
答案
解析
试题分析:找到两个抛物线的顶点,根据抛物线的顶点即可判断是如何平移得到.
∵y=(x-2)2+3的顶点坐标为(2,3),y=-x2的顶点坐标为(0,0),
∴将抛物线y=-x2向右平移2个单位,再向上平移3个单位,可得到抛物线y=(x-2)2+3.
故选D.
考点: 二次函数图象与几何变换.
核心考点
试题【抛物线y=-x2可由抛物线y=-(x-2)2+3如何平移得到( )A.先向左平移2个单位,再向下平移3个单位B.先向右平移2个单位,再向下平移3个单位C.】;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/20191019/20191019035917-12237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035917-80593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035917-76203.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035910-51142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035911-80590.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035905-11772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035905-55281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035905-96642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035905-95869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035905-15269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035854-97522.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035854-45117.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035855-60997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035855-31755.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035855-61448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035855-38582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035855-49679.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035856-53047.jpg)
(1)求点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035856-52977.png)
(2)求四边形
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035856-25178.png)
(3)抛物线上是否存在点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035856-78419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035857-69093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035856-78419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-45661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-97191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-31332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-23989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-60194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-93134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-97191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-41446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-56571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-84476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-65396.jpg)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-84476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-27862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-33826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-84476.png)
(2)在
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-93134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-93134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-60194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-70601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-70601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-84476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-84476.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035843-93134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-96005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-12733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-82616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-31332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-56965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-96005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-43928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-33826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-82616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-12733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-43928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-43928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035842-31332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035844-33826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035845-96005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019035846-44282.jpg)
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