如图,在平面直角坐标系xOy中,抛物线
经过点
,
.
(1)求抛物线的表达式.
(2)已知点
是抛物线上的点,将点M向左平移3个单位长度得到点
,若点
恰好也在该抛物线上,求点M的坐标.
(3)在(2)的条件下,记点B与点
之间的抛物线为图象G(含点B和点
),当直线
与图象G只有一个交点时,直接写出b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/052c64db4c483e6f99913bb41ddf2b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b8c639c851e0044ee22020324c5570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6711f23c2900c7b00a833bf21edb23d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/1/97dd1b88-417e-4d0c-bb7e-617e821b8e99.png?resizew=147)
(1)求抛物线的表达式.
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c17f192f039cae8e876c335882997f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
(3)在(2)的条件下,记点B与点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07565f10847840e0fb07b05218ad17fa.png)
2023·河南周口·二模 查看更多[4]
2023年河南省周口市扶沟县中考二模数学试题2023年河南省信阳市浉河区浉河港中心校中考三模数学试题北京交通大学附属中学2023-2024学年九年级上学期开学考试数学试题(已下线)2023年河南省二模(二次函数综合1)
更新时间:2023-05-30 23:52:41
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【推荐1】已知抛物线
的图象与x轴相交于点A和点
,与y轴交于点C,连接
,有一动点D在线段
上运动,过点D作x轴的垂线,交抛物线于点E,交x轴于点F,
,设点D的横坐标为m.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/b27fa470-ea58-476a-8b9a-bac0a283b3d5.png?resizew=433)
(1)求抛物线的解析式;
(2)连接
,当
的面积最大时,求出
的最大面积和点D的坐标;
(3)当
时,在平面内是否存在点Q,使以B,C,E,Q为顶点的四边形为平行四边形?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/b27fa470-ea58-476a-8b9a-bac0a283b3d5.png?resizew=433)
(1)求抛物线的解析式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3719cea07e8f138a4d7818536712282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0db2c49919467a2e14540f2aabd05cb.png)
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【推荐2】如图,在平面直角坐标系中,抛物线
与
轴交于点A,B(点A在B的左侧),与
轴交于点C.
(1)若OB=OC=3,求抛物线的解析式及其对称轴;
(2)在(1)的条件下,设点P在抛物线的对称轴上,求PA+PC的最小值和点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b8913fb307288ad8334ba8dd0d800b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)若OB=OC=3,求抛物线的解析式及其对称轴;
(2)在(1)的条件下,设点P在抛物线的对称轴上,求PA+PC的最小值和点P的坐标.
![](https://img.xkw.com/dksih/QBM/2020/12/29/2624490190790656/2625222410846208/STEM/050d62580c8445d085103fc9d62e9787.png?resizew=215)
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【推荐1】已知点P(x,y)是第一象限内的点,且x+y=8,点A的坐标为(10,0).设△OAP的面积为S.求S与x的函数关系式,并写出自变量x的取值范围;
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【推荐2】已知抛物线
与
轴交于
,
两点,与
轴交于点
,顶点为
.
![](https://img.xkw.com/dksih/QBM/2023/3/28/3204532244930560/3205148758089728/STEM/e0ae7f62a6d3439ebb180b20842a8fb4.png?resizew=249)
(1)求
的值及顶点
的坐标;
(2)如图1,连接
,点
是直线
上方抛物线上的点,连接
,
,
交
于点
,当
时,求直线
的解析式;
(3)如图2,动直线
交抛物线于点
,连接
,
分别交
轴的正半轴和负半轴于点
,求证:
为常数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e3587d213f33b43bcb49ca78d9cdf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2023/3/28/3204532244930560/3205148758089728/STEM/e0ae7f62a6d3439ebb180b20842a8fb4.png?resizew=249)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3630479593fbe2d0c39ce6ba8cd5ff9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)如图2,动直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cb1ce4cd640c74bdbfcd2c4306897f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f614d6fec06afa04d6c9a6c2bac8314.png)
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