如图,平面直角坐标系中,抛物线
与x轴交于点
,顶点为
,对称轴l与x轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/4869b270-cc93-4de6-85f6-ec5b4126d5c0.png?resizew=174)
(1)求该抛物线的表达式;
(2)点M在抛物线上,过点M作对称轴l的垂线,垂足为点E,点F在l上,若以M、E、F为顶点的三角形与
全等,请求出满足条件的所有点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee80939187a84e1863eeb192a301c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097e8a6a6de675f44d3bef88bb37375c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/4869b270-cc93-4de6-85f6-ec5b4126d5c0.png?resizew=174)
(1)求该抛物线的表达式;
(2)点M在抛物线上,过点M作对称轴l的垂线,垂足为点E,点F在l上,若以M、E、F为顶点的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
22-23九年级上·陕西西安·期末 查看更多[3]
更新时间:2023-01-23 16:59:13
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适中
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【推荐1】如图,抛物线与
轴相交于
,
两点,且经过点
,点
为抛物线与
轴的交点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/61841952-ff43-4874-84e3-d298da1c43ab.png?resizew=114)
(1)求抛物线的函数表达式;
(2)连接
,若点
为抛物线上的一点,
,求
点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663d94efcc8a8a4b5a3563e94eb8fbb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/61841952-ff43-4874-84e3-d298da1c43ab.png?resizew=114)
(1)求抛物线的函数表达式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871086b40fdebd773d04b75fea46cefc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】已知二次函数
(a为常数).
(1)若二次函数的图象经过点
,求函数y的表达式.
(2)若
,当
时,此二次函数y随着x的增大而减小,求m的取值范围.
(3)点
和
是这个二次函数的图象上的动点,若
有最大值4,求常数a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0600dfe3a9a78adf61335f6ab625c790.png)
(1)若二次函数的图象经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3654254401fc902c3cb4912969f21f88.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87150f3eb874fed5d82eaf8c67f58b55.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5445b4183917494ad8aa1731073dd1d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969ed2e78f4316a5a01ab87cf6a916e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1302d34f175abed5cc54aba6d4b33a.png)
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【推荐1】如图1,抛物线y=x2+bx+c与x轴交于点A(﹣3,0),B(1,0),与y轴交于点D,顶点为C,直线BC交y轴于点E.
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893554996166656/2918523793416192/STEM/b54dabe8-b3b9-4534-8412-c03b12bc0e82.png?resizew=516)
(1)求抛物线的解析式;
(2)如图2,将△OBE沿直线BC平移得到△FGH.
①当点F落在抛物线上时,求点F的坐标.
②在△FGH移动过程中,是否存在点F,使得△ACF是以AC为直角边的直角三角形?若存在,请求出点F的坐标,若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893554996166656/2918523793416192/STEM/b54dabe8-b3b9-4534-8412-c03b12bc0e82.png?resizew=516)
(1)求抛物线的解析式;
(2)如图2,将△OBE沿直线BC平移得到△FGH.
①当点F落在抛物线上时,求点F的坐标.
②在△FGH移动过程中,是否存在点F,使得△ACF是以AC为直角边的直角三角形?若存在,请求出点F的坐标,若不存在,请说明理由.
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【推荐2】如图,抛物线
的对称轴是直线x=1,与x轴交于点A,
,与y轴交于点C,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/b1deb888-2b3d-4af3-9f2d-6b3f23904419.png?resizew=206)
(1)求此抛物线的解析式;
(2)已知点D是第一象限内抛物线上的一个动点,过点D作
轴,垂足为点M,
交直线
于点N,是否存在这样的点N,使得以A,C,N为顶点的三角形是等腰三角形.若存在,请求出点N的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96dde9c4aad0536c069127df0d4b12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/b1deb888-2b3d-4af3-9f2d-6b3f23904419.png?resizew=206)
(1)求此抛物线的解析式;
(2)已知点D是第一象限内抛物线上的一个动点,过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4914b846a985658a528ab9d70ccc7c30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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