如图,二次函数
. 的图象与x轴交于A、B两点(点A 在点B的左侧),与y轴交于点 C,顶点为D,其对称轴与线段
交于点 E,与x轴交于点 F. 连接
.
, 求B 点和C 点坐标;
(2)若
求m的值;
(3)若在第一象限内二次函数
的图象上,始终存在一点P,使得
请结合函数的图象,直接写出m的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e648cac4baee788b4b113b25bc3f203e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32708fff7900a4acc42e03694525e1f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662d82efc799033df65e66c2c8dcc8b6.png)
(3)若在第一象限内二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e648cac4baee788b4b113b25bc3f203e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b67b70dafaf337d2e43630c6d0c6ffc.png)
更新时间:2024-04-10 16:24:42
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【推荐1】如图,“爱心”图案是由抛物线
的一部分及其关于直线
的对称图形组成,点E、F是“爱心”图案与其对称轴的两个交点,点A、B、C、D是该图案与坐标轴的交点,且点D的坐标为
.
(1)求m的值及AC的长;
(2)求
的长;
(3)若点P是该图案上的一动点,点P、点Q关于直线
对称,连接
,求
的最大值及此时Q点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ecc6a3e907c42c236de968817f3867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5973fe67568caf975b1cef998a363227.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/0c01cf24-afd9-4c98-873d-c33d528d9553.png?resizew=209)
(1)求m的值及AC的长;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)若点P是该图案上的一动点,点P、点Q关于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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【推荐2】如图
,某广场要修建一个景观喷水池,水从喷头喷出后呈抛物线形状先向上至最高点后落下.将中间立柱近似看作一条线,以其为
轴建立如图
所示直角坐标系.已知中间立柱顶端
到地面的距离为
,喷水头
恰好是立柱
的中点.若水柱上升到最高点
时,高度为
,到中间立柱的距离为
.
中第一象限内抛物线的函数表达式.
(2)为了使水落下后全部进入水池中,请判断圆形水池的直径不能小于多少米?
(3)实际施工时,决定对喷水设施做如下设计改进,把水池的直径修成
,在不改变喷出的抛物线形水柱形状的情况下,且喷出的抛物线形水柱在与池中心的水平距离为
处达到最高,需对水管的长度进行调整,求调整后水管的最大长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e17ee14bd91bfff409c06fd434f6745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7854968bbf6576a1fd9926ee0d4d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f328ba89c0a92a4447788b65571f7aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(2)为了使水落下后全部进入水池中,请判断圆形水池的直径不能小于多少米?
(3)实际施工时,决定对喷水设施做如下设计改进,把水池的直径修成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe35c9c09d1cb7c065df164ae5c62ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f328ba89c0a92a4447788b65571f7aa.png)
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【推荐1】(2017届北京市平谷区4月初三统一练习(一)数学试卷)直线
与x轴,y轴分别交于A,B两点,点A关于直线
的对称点为点C.
![](https://img.xkw.com/dksih/QBM/2018/6/12/1965675579318272/1966845077209088/STEM/7d62f099884a41568509b055178bf52f.png?resizew=229)
(1)求点C的坐标;
(2)若抛物线
经过A,B,C三点,求该抛物线的表达式;
(3)若抛物线
经过A,B两点,且顶点在第二象限,抛物线与线段AC有两个公共点,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c653f3ac494070e375977c3bcb3ede1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://img.xkw.com/dksih/QBM/2018/6/12/1965675579318272/1966845077209088/STEM/7d62f099884a41568509b055178bf52f.png?resizew=229)
(1)求点C的坐标;
(2)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce25be25b86073f97f7e53ccc8a5683.png)
(3)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415ce7008a89ffca8c3c3edbf13a935e.png)
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【推荐2】已知抛物线
经过点
.
的值;
(2)
为抛物线上两点,其中
.
(
)若
,且
两点均在该抛物线对称轴的左侧,求
的取值范围;
(
)如图,
为坐标原点,过
两点作
轴的垂线与线段
分别交于
两点.若四边形
为平行四边形,求四边形
周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb81c0659670d0030fafb47b2b94ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbf9d011b61bf4addcbe0b87a134702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b579656abbbdc02de4ff765f0497dc6.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14e8ed32ca08f63c9574fed8c68821e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ad58997b9dc0b341c9af08f0cd1fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de82aff5049dce8a3d56291dc2ae4af.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971ab6567c156fee308640828a804415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cb7a12bb8797615303fc20adb9f988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cb7a12bb8797615303fc20adb9f988.png)
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【推荐1】如图,在平面直角坐标系中,二次函数
的图象与x轴交于点A和点
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/63461e1e-d6a7-49e6-947b-2184942f543b.png?resizew=398)
(1)求二次函数的表达式;
(2)连接
,找出图中与
相等的角,并说明理由;
(3)若点P是抛物线上一点,满足
,求点P的坐标;
(4)若点Q在第四象限内,且
,
,线段
是否存在最大值,如果存在,求出最大值;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58a0b2c6080621bac5724762e3cb2c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ac227415188548180ea445fc383647.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/63461e1e-d6a7-49e6-947b-2184942f543b.png?resizew=398)
(1)求二次函数的表达式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fc1df99f9a3c9e22d2041a89e2880f.png)
(3)若点P是抛物线上一点,满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9177357c4268d8d0600825bf54c5edc2.png)
(4)若点Q在第四象限内,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd70e4a3ca00411f4f4cad46f95698b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd8e64357ad1eff6337e6f0d42bbea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
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【推荐2】如图1,
是
的直径,点
在
的延长线上,
是
的内接三角形,
,
.
(1)求
的度数.
(2)求证:
是
的切线.
(3)如图2,若
,
是
的平分线且交
于点
,交
于点
,连接
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284a563413dc0532138fb2a64db8cc2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/21/5b99529d-944a-406b-b0a0-4dc0b63f27ec.png?resizew=421)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142544a6d4e6851096afbd3cbad2fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc47dd599bf449e822fe691a1e9051a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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【推荐1】已知抛物线
经过点
,
,与y轴的交点为C.
(1)求该抛物线的函数表达式;
(2)若点P是该抛物线上一点,且位于其对称轴m右侧,对称轴m与x轴交于点M,过点P作
轴,垂足为N.若
,求出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b286a72a818ccc52e63581841da08dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
(1)求该抛物线的函数表达式;
(2)若点P是该抛物线上一点,且位于其对称轴m右侧,对称轴m与x轴交于点M,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0522607eeb42a499c0f5b040bbdd42e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50301140023f228570d97871ff82f17c.png)
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【推荐2】综合与探究
如图,在平面直角坐标系中,点
为坐标原点,抛物线
与
轴交于点
,与
轴交于点
,
,抛物线的对称轴交抛物线于点
,交
轴于点
,交直线
于点
.
![](https://img.xkw.com/dksih/QBM/2020/4/22/2447114593910784/2447803541364736/STEM/b15a77cd08474881bb29823b77e35d48.png?resizew=144)
![](https://img.xkw.com/dksih/QBM/2020/4/22/2447114593910784/2447803541364736/STEM/7d5d5c3703ca49949905403c1494ad74.png?resizew=137)
(1)求抛物线的函数表达式及其对称轴:
(2)点
是线段
上一点,且
,求点
的坐标;
(3)若点
是抛物线上任意一点,点
是直线
上任意一点,点
是平面上任意一点,是否存在这样的点
,
,
,使得以点
,
,
,
为顶点的四边形是正方形,若存在,请直接写出点
的坐标,若不存在,请说明理由.
如图,在平面直角坐标系中,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad97284da351a44c36c11d5cec429a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c77a42750684cb6157c2c7fb9422a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16c9f25703e265026af2d481e64414d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2020/4/22/2447114593910784/2447803541364736/STEM/b15a77cd08474881bb29823b77e35d48.png?resizew=144)
![](https://img.xkw.com/dksih/QBM/2020/4/22/2447114593910784/2447803541364736/STEM/7d5d5c3703ca49949905403c1494ad74.png?resizew=137)
(1)求抛物线的函数表达式及其对称轴:
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7c8f4a0af899b225b64198bec817aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐3】已知抛物线的解析式y=ax2+bx+3与x轴交于A、B两点,点B的坐标为(﹣1,0)抛物线与y轴正半轴交于点C,△ABC面积为6.
(1)如图1,求此抛物线的解析式;
(2)P为第一象限抛物线上一动点,过P作PG⊥AC,垂足为点G,设点P的横坐标为t,线段PG的长为d,求d与t之间的函数关系式,并直接写出自变量t的取值范围;
(3)如图2,在(2)的条件下,过点B作CP的平行线交y轴上一点F,连接AF,在BF的延长线上取点E,连接PE,若PE=AF,∠AFE+∠BEP=180°,求点P的坐标.
(1)如图1,求此抛物线的解析式;
(2)P为第一象限抛物线上一动点,过P作PG⊥AC,垂足为点G,设点P的横坐标为t,线段PG的长为d,求d与t之间的函数关系式,并直接写出自变量t的取值范围;
(3)如图2,在(2)的条件下,过点B作CP的平行线交y轴上一点F,连接AF,在BF的延长线上取点E,连接PE,若PE=AF,∠AFE+∠BEP=180°,求点P的坐标.
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