1 . 如图:对称轴
的抛物线
与
轴相交于A,B两点,其中点A的坐标为
,且点
在抛物线
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/221f96e6-7932-4d1c-948d-974a876fb9a5.png?resizew=122)
(1)求抛物线的解析式;
(2)点C为抛物线与
轴的交点.
①在对称轴直线
上找到一点P,使得
的周长最小,求出P点的坐标.
②设点Q是线段
上的动点,作
轴交抛物线于点D,求线段
长度的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1c84057882768f20a01365c81b6760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663d94efcc8a8a4b5a3563e94eb8fbb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/221f96e6-7932-4d1c-948d-974a876fb9a5.png?resizew=122)
(1)求抛物线的解析式;
(2)点C为抛物线与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
①在对称轴直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
②设点Q是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac5c9bc238d2eb0e735b0477417ffec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c118858379800688c993a8b61270b356.png)
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2022-12-05更新
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199次组卷
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6卷引用:山东省德州市德城区第五中学2022-2023学年九年级上学期期中数学试题
2 . 如图,已知点
,
在抛物线
:
的图象上,图象经过点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/d9c3d1e4-0236-4755-b98d-91081190de28.png?resizew=159)
(1)求抛物线
的函数表达式.
(2)将抛物线
向上平移
个单位得到抛物线
.若抛物线
的顶点关于坐标原点
的对称点在抛物线
上,求
的值.
(3)若
,求顶点到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311a36f03fac6d979014e605e80913a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d046826b3840b908d823d90be499e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448dcb9a05c19cb3522b48c93f864468.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee6f55f5de53781cc0e1c61f9fc5995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff60258b85de1026d0d3fa73b6e8d73.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/d9c3d1e4-0236-4755-b98d-91081190de28.png?resizew=159)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
(2)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93a232c88870d213a7b74a796a1ff4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1292c47f62023b747f1a4bd615c75284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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真题
3 . 如图,题目中的黑色部分是被墨水污染了无法辨认的文字,导致题目缺少了一个条件而无法解答,经查询结果发现,该二次函数解析式
,
(1)请根据已有信息添加一个适当的条件:___________
(2)当函数值
,自变量x的取值范围为:___________
(3)如图1,将函数
的图象向右平移4个单位与
的图象组成一个新的函数图像,记为L,若点
,求m的值.
(4)如图2,在(3)的条件下,点A的坐标为
,在L上是否存在点Q,使得
,若存在,求出所有满足条件的点Q的坐标,不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12bd6a8ebe4b708851dec94d70fdcfb5.png)
已知二次函数![]() ![]() ![]() ![]() 求该二次函数的解析式. |
(2)当函数值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b2f3de1b1569515074732310b1c064.png)
(3)如图1,将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d95c4d9e65d99a8a3028962085044e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce4a235036818a36af5651bdb95bc61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79e00d260b97e7364ba94fc75fbcb473.png)
(4)如图2,在(3)的条件下,点A的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f8c1c636aa5eae8146e6b515ca6115.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/8c9d8286-a8bb-4df6-9515-6804ac24f831.png?resizew=260)
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3卷引用:山东省德州市庆云县2022-2023学年九年级上学期期中数学试题
4 . 如图1,在平面直角坐标系中,抛物线
与
轴交于
、
两点,与
轴负半轴交于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/5d77717c-9957-423d-b1b8-bab5e9bdad91.png?resizew=523)
(1)试求抛物线的解析式;
(2)如图2,点
为抛物线上第一象限内一点,过点
作
轴的平行线,交直线
于点
,当
时,求
点的坐标及此时
的面积;
(3)如图3,直线
与
轴交于点
,与抛物线交于第四象限的点
,与直线
交于点
,记
,请判断
是否有最大值,如有请求出
取最大值时点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd69aebdafb31468eb13ce3b28a36e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.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/84acb42778406c1a60d818f6ca760366.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/5d77717c-9957-423d-b1b8-bab5e9bdad91.png?resizew=523)
(1)试求抛物线的解析式;
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](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/859011bd678f0346f19808bc299de608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8617a520589aa336b0c4725d4fd1c7d6.png)
(3)如图3,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231896d2386c924306fce5ccf9f9e8a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd5573b36608e724b88e96fa0ce353e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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5 . 将抛物线
先向下平移3个单位,再向右平移
个单位,所得新抛物线经过点
.新抛物线的表达式为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108c18cb76d7d34b05c991a644c8b136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93a232c88870d213a7b74a796a1ff4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4559e8b5861ebbf7c0f5c6d9a819f97.png)
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2022-12-05更新
|
149次组卷
|
3卷引用:山东省泰安市新泰市2022-2023学年九年级上学期期中数学试题
山东省泰安市新泰市2022-2023学年九年级上学期期中数学试题(已下线)2.3 确定二次函数的表达式(分层练习)-2022-2023学年九年级数学下册同步精品课堂(北师大版)四川省广元市利州区2022-2023学年九年级上学期期中考试数学试题
6 . 如图,抛物线
过点
,
,与y轴交于点C.在x轴上有一动点
,过点P作x轴的垂线l分别交抛物线和直线
于F、G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/19f97d20-dcc7-4449-aabd-b59e394655ab.png?resizew=223)
(1)求抛物线的解折式;
(2)求线段
长度的最大值,并求此时点F的坐标;
(3)当
时,H是直线l上的点且在第一象限内,若
是以
为直角边的直角三角形,求点H的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e67f5b82290e8a0bd8bd25f091cd45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/19f97d20-dcc7-4449-aabd-b59e394655ab.png?resizew=223)
(1)求抛物线的解折式;
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6629fbe2eef7def1afa88acbbabdb10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
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7 . 如图,已知抛物线
与x轴交于
,
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/df99d9d2-acf4-41ad-b58e-6184422b142f.png?resizew=190)
(1)求c、t的值;
(2)若点P是抛物线第一象限内的一个动点,且满足
,求点P坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af74d7bab722ccee2ab50a574733516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f7d59f0b892737e233e68b34e0aa64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/df99d9d2-acf4-41ad-b58e-6184422b142f.png?resizew=190)
(1)求c、t的值;
(2)若点P是抛物线第一象限内的一个动点,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9062775de5946d57d767eeaef50262c1.png)
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8 . 如图,直线
与x轴交于点A,与y轴交于点C,抛物线
过点A.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/56d39ecc-478b-43fc-b080-a0754eb84b8f.png?resizew=503)
(1)求出抛物线解析式的一般式;
(2)抛物线上的动点D在一次函数的图象下方,求
面积的最大值,并求出此时点D的坐标;
(3)若点P为x轴上任意一点,在(2)的结论下,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0422763a223a1a690c9c488f6b4076ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd91539551d6f675292df65a8f44aaa1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/56d39ecc-478b-43fc-b080-a0754eb84b8f.png?resizew=503)
(1)求出抛物线解析式的一般式;
(2)抛物线上的动点D在一次函数的图象下方,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(3)若点P为x轴上任意一点,在(2)的结论下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8bf774ea5c9b87dc76962cb4bab147.png)
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9 . 如图,抛物线
与直线
交于点
,
.点D是抛物线上A,B两点间的一个动点(不与点A,B重合),直线
与y轴平行,交直线
于点C,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/dc094634-5a58-4214-91a4-b1e7ab914404.png?resizew=741)
(1)求抛物线的解忻式;
(2)设点D的横坐标为m,
的面积为S,求S关于m的函数关系式,并求出当S取最大值时的点C的坐标;
(3)点D为抛物线的顶点,点P是抛物线上的动点,点Q是直线
上的动点.当以点P,Q,C,D为顶点的四边形是平行四边形时,求出点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66629831fb9f2df59a69a7dbcf6274e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740b380dd967a539f1af5676690690da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a77aa6c27acfffcc601d9ca7e6d4c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/dc094634-5a58-4214-91a4-b1e7ab914404.png?resizew=741)
(1)求抛物线的解忻式;
(2)设点D的横坐标为m,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f517953a21c2a45fd8465072c44bfc.png)
(3)点D为抛物线的顶点,点P是抛物线上的动点,点Q是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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10 . 如图,在平面直角坐标系中,抛物线
经过点
,点M为抛物线的顶点,点B在y轴上,直线
与抛物线在第一象限交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/160d63ce-e790-4fe5-908f-502458915381.png?resizew=160)
(1)求抛物线的解析式;
(2)连接
,若过点O的直线交线段
于点P,将三角形
的面积分成
的两部分,请求出点P的坐标;
(3)若Q是直线
上方抛物线上一个动点(不与点A、C重合),当
的面积等于
的面积时,求出Q点的坐标;
(4)在抛物线的对称轴上有一动点H,在抛物线上是否存在一点N,使以点A、H、C、N为顶点的四边形是平行四边形?若存在,求出点N的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c468dc5cc34c14a188493a21019e8f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a525534689bd2701205d4ab17574c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d0785a08303a75cac963bc78341b513.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/160d63ce-e790-4fe5-908f-502458915381.png?resizew=160)
(1)求抛物线的解析式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed01d1ff5a7f21a68fb3a1e5c7f393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
(3)若Q是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bc4b926b29e58400df99ebf5771404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
(4)在抛物线的对称轴上有一动点H,在抛物线上是否存在一点N,使以点A、H、C、N为顶点的四边形是平行四边形?若存在,求出点N的坐标,若不存在,请说明理由.
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