如图,抛物线
与x轴的两个交点A、B,与y轴交于点C,A点坐标为(4,0),C点坐标(0,-4).
![](https://img.xkw.com/dksih/QBM/2013/6/3/1573660661686272/1573660667109376/STEM/4ea60f3fd0a74023a256f9d095c7f653.png)
(1)求抛物线的解析式;
(2)用直尺和圆规作出△ABC的外接圆⊙M,(不写作法,保留作图痕迹),并求⊙M的圆心M的坐标;
![](https://img.xkw.com/dksih/QBM/2013/6/3/1573660661686272/1573660667109376/STEM/44433945b2a3479c8d0d711e17faf9e4.png)
![](https://img.xkw.com/dksih/QBM/2013/6/3/1573660661686272/1573660667109376/STEM/4ea60f3fd0a74023a256f9d095c7f653.png)
(1)求抛物线的解析式;
(2)用直尺和圆规作出△ABC的外接圆⊙M,(不写作法,保留作图痕迹),并求⊙M的圆心M的坐标;
更新时间:2016-12-05 18:03:44
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【知识点】 图形问题(实际问题与二次函数)
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知二次函数图像的对称轴为直线
,且过点
与
,请你判断下列四个说法是否正确,并说明理由.
①当
时,函数有最大值2;
②当
时,函数有最小值
;
③点P是第一象限内抛物线上的一个动点,则
面积的最大值为
;
④对于非零实数m,当
时,y都随着x的增大而减小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2b1f4120365cb6ee4925fe417563f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3aa54a79b21b2f5be603e8a83017f9.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ca447a80ebb3b46fc2d9f5c3f20f60.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ca447a80ebb3b46fc2d9f5c3f20f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
③点P是第一象限内抛物线上的一个动点,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53502463cc76201000e02df314e58769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
④对于非零实数m,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be70babbf68dfdfd676e268473d7dc98.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,已知抛物线
的顶点为
是抛物线上位于第一象限内的一点,直线
交该抛物线的对称轴于点
对称轴与
轴交于点
直线
交
轴于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/f6068b0b-cb26-484e-9b34-42539c39c0b3.png?resizew=162)
求该抛物线的解析式;
如果
的面积等于
的面积,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe341d471bf73c9563b47e308279dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0925a8681562ebfa9190b267e85099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98914a2f34d457acf18e36d3b6eac5f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/f6068b0b-cb26-484e-9b34-42539c39c0b3.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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