如图,已知抛物线y=ax2+bx+c(a≠0)与x轴交于A(-1,0),B(4,0)两点,与y轴交于点C(0,-2).
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936831372001280/2942493842186240/STEM/be5f1bd7532144d1bb56376b8ad00517.png?resizew=176)
(1)求抛物线的解析式;
(2)连接AC,BC,若点P是抛物线上一点(不与点C重合),且S△ABC=S△ABP,求点P的坐标;
(3)点D为抛物线在第四象限上一点,连接AD,交BC于点E,连接BD,记△BDE的面积为S1,记△BAE的面积为S2,求
的最大值.
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936831372001280/2942493842186240/STEM/be5f1bd7532144d1bb56376b8ad00517.png?resizew=176)
(1)求抛物线的解析式;
(2)连接AC,BC,若点P是抛物线上一点(不与点C重合),且S△ABC=S△ABP,求点P的坐标;
(3)点D为抛物线在第四象限上一点,连接AD,交BC于点E,连接BD,记△BDE的面积为S1,记△BAE的面积为S2,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
更新时间:2022-03-23 17:01:57
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【推荐1】在
中,
,
,
,点
是
边上任意一点,点
是直线
上一动点,连接
,将
绕点
顺时针旋转,旋转角为
,得到线段
,连接
.
,
,点
在射线
上,求
的长;
(2)如图2,
,
于点
,
,猜想线段
之间存在的数量关系,并证明你的猜想:
(3)如图3,
,点
在射线
上,点
是
上一点且满足
,连接
,直接写出当
最小时,点
到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0499f71fbc8f777a9246078e4ccb4c53.png)
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(2)如图2,
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(3)如图3,
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【推荐2】(1)如图1,已知线段
,平面内有一动点
,且
,则
的最小值为______.
(2)如图2,
中,
,点
为
的中点,点
为
内一动点,
,连接
,过点
作
,且
,连接
,求
的长.
(3)某工厂计划加工如图3所示的
零件,要求
分米,
,在
上有一点
,连接
,请你帮工人师傅计算
是否存在最小值,若存在,请求出
的最小值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
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(2)如图2,
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【推荐1】如图1,已知直线
与x轴相交于点C,抛物线
经过不同的三个点
,
,C(点A在点B的左边).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/25837048-f1d1-45d8-a71a-30746991ab84.png?resizew=397)
(1)求抛物线的解析式.
(2)当点A位于x轴的上方,过点A作
交直线
于点P,以
为邻边构造矩形
,求该矩形周长的最小值,并求出此时点A的坐标.
(3)如图2,将抛物线先向右平移2个单位,再向上平移2个单位得到新的抛物线
,新的抛物线
与原抛物线相交于点D,与y轴相交于点E,点N是平移后新抛物线对称轴上一点.点M是坐标平面内一点,当以D、E、M、N为顶点的四边形是菱形时,直接写出所有点M的坐标,并把求其中一个点M的坐标过程写出来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077f6a9325b635be91f94326bcca6448.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/25837048-f1d1-45d8-a71a-30746991ab84.png?resizew=397)
(1)求抛物线的解析式.
(2)当点A位于x轴的上方,过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d390782b8ea7016628ee68403dcbfbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077f6a9325b635be91f94326bcca6448.png)
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(3)如图2,将抛物线先向右平移2个单位,再向上平移2个单位得到新的抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
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【推荐2】如图1,在平面直角坐标系中,抛物线
与x轴交于
和
,与y轴交于点C,连接
.
(1)求该抛物线的解析式;
(2)如图1,在x轴上有一动点D,平面内是否存在一点E,使以点A、D、C、E为顶点的四边形是菱形?若存在,请求出点E的坐标,若不存在,请说明理由.
(3)如图2,点M为抛物线上的一动点:
①若点M为直线
上方的抛物线上任意一点,过点M作y轴的平行线,交
于点N,过点M作x轴的平行线,交直线
于点Q,求
周长的最大值;
②若点M为抛物线上的任意一动点,且
,请直接写出满足条件的点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ffc79ad3c37fb879fb0b47f7a8da5f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f752d0257c9aae75e212755abc1b0.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/e87e9e47-d45c-4e32-98ee-cbd210f6cf28.png?resizew=584)
(1)求该抛物线的解析式;
(2)如图1,在x轴上有一动点D,平面内是否存在一点E,使以点A、D、C、E为顶点的四边形是菱形?若存在,请求出点E的坐标,若不存在,请说明理由.
(3)如图2,点M为抛物线上的一动点:
①若点M为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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②若点M为抛物线上的任意一动点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1cf95a902ee77532760db3132a5877e.png)
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