如图.已知抛物线
经过
三点,
为坐标原点
(2)若把抛物线
向下平移
个单位度,再向右平移
个单位长度得到新抛物线,若新抛物线的顶点
在
内.求
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2afe3c522e7eb8eb2d88862e7343e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)若把抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920412ba07915840a5475e3c7d29894e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b829d3ded5f93007d3ba22f2a862efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
更新时间:2023-12-06 23:35:52
|
相似题推荐
解答题-问答题
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较难
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【推荐1】如图,抛物线
交直线
于坐标轴上
两点,交
轴于另一点
,连接
.
(2)点
为线段
上一点,过点
作直线
,交
轴于点
.连接
,求
面积的最大值;
(3)若在直线
上存在点
,使得以点
为顶点的四边形为菱形,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812eed46a589bde8b7c78a81a8cf9b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.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/60ef95894ceebaf236170e8832dcf7e3.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404a155d79dbfa434a6a0225a161f710.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(3)若在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80892733f67f83ad57a3d01212309778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】如图,抛物线
的图象经过
,
两点.
(2)抛物线的顶点M与对称轴l上的点N关于x轴对称,直线
交抛物线于点D,直线
交
于点E,若直线
将
的面积分为
两部分,求点E的坐标;
(3)P为抛物线上的一动点,Q为对称轴上动点,抛物线上是否存在一点P,使A、D、P、Q为顶点的四边形为平行四边形?若存在,求出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090c4dd88844cf183b70eb04ed61ca5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8950c7bc835103d52ceffab14b6b31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36488f7dff759ace2a27e56c3857056.png)
(2)抛物线的顶点M与对称轴l上的点N关于x轴对称,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/37d65e051e943ab28fa57aee2fb57994.png)
(3)P为抛物线上的一动点,Q为对称轴上动点,抛物线上是否存在一点P,使A、D、P、Q为顶点的四边形为平行四边形?若存在,求出点P的坐标;若不存在,请说明理由.
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【推荐3】如图,抛物线
(a≠0)与x轴、y轴分别交于点A,B,C三点,已知点A(﹣2,0),点C(0,﹣8),点D是抛物线的顶点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/0b9d4265-f007-421b-9102-ea4f03569902.png?resizew=399)
(1)求抛物线的解析式及顶点D的坐标;
(2)如图1,抛物线的对称轴与x轴交于点E,第四象限的抛物线上有一点P,将△EBP沿直线EP折叠,使点B的对应点
落在抛物线的对称轴上,求点P的坐标;
(3)如图2,设BC交抛物线的对称轴于点F,作直线CD,点M是直线CD上的动点,点N是平面内一点,当以点B,F,M,N为顶点的四边形是菱形时,请直接写出点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc229acc8bf1a2047394bda863b1ea71.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/0b9d4265-f007-421b-9102-ea4f03569902.png?resizew=399)
(1)求抛物线的解析式及顶点D的坐标;
(2)如图1,抛物线的对称轴与x轴交于点E,第四象限的抛物线上有一点P,将△EBP沿直线EP折叠,使点B的对应点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
(3)如图2,设BC交抛物线的对称轴于点F,作直线CD,点M是直线CD上的动点,点N是平面内一点,当以点B,F,M,N为顶点的四边形是菱形时,请直接写出点M的坐标.
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【推荐1】如图所示,将抛物线
沿
轴向右平移
个单位长度,再向下平移
个单位长度,得到新的抛物线.
(1)直接写出新抛物线的解析式为 ;
(2)1/2 设新抛物线交
轴于
、
两点,交
轴于
,顶点为
,作
交抛物线于
,如图所示,探究如下问题:
①求点
的坐标;
②若一次函数
的图象与抛物线存在唯一交点且交对称轴交于点
,连接
,猜测直线
与对称轴的夹角和一次函数
的图象与对称轴的夹角之间的大小关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aafae84e7fe39dc5b694c39405201d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/0afa75ba-01de-4d72-9109-d1ddbe9fdc58.png?resizew=366)
(1)直接写出新抛物线的解析式为 ;
(2)1/2 设新抛物线交
![](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/7f9e8449aad35c5d840a3395ea86df6d.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://staticzujuan.xkw.com/quesimg/Upload/formula/ef6d946ec5bc75341f7e5fe400054464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
②若一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
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【推荐2】已知,点
在平面直角坐标系中,小明给了一些m的取值,列出了如表:
(1)求该抛物线相应的函数表达式,并说明:无论m取何实数值,点M都在此抛物线上;
(2)将抛物线向右平移n(
)个单位得到新的抛物线,设
是新函数的图象与x轴的一个公共点.当
时,结合函数的图象,直接写出n的取值范围;
(3)设(1)中的抛物线与x轴的交点分别为点B、C(点B在点C的左侧),点D在该抛物线的对称轴上,
是
以点D为位似中心的位似图形(点A、B、C的对应点分别是点P、Q、M).若
与
的相似比是
,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b218a935de4fa6a544bf5c38e7c58b.png)
m | … | 0 | 1 | … | ||
… | 0 | … | ||||
… | 2 | 3 | 2 | … |
(1)求该抛物线相应的函数表达式,并说明:无论m取何实数值,点M都在此抛物线上;
(2)将抛物线向右平移n(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff035ca131c306d37e6c17cc72dc781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c475bf48d5b5037275831f005febc4ec.png)
(3)设(1)中的抛物线与x轴的交点分别为点B、C(点B在点C的左侧),点D在该抛物线的对称轴上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99675fa03da205c4499967c9d908412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99675fa03da205c4499967c9d908412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db20862b954cd1886f4765657a46d91c.png)
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解题方法
【推荐1】在平面直角坐标系
中,对于点
和点
,给出如下定义:若
则称点
为点
的限变点.
(1)点
的限变点的坐标是 ,点
的限变点的坐标是 .
(2)若点
在函数
的图象上,其限变点
的纵坐标
的取值范围是
,求
的取值范围.
(3)若点
在关于
的二次函数
的图象上,其限变点
的纵坐标
的取值范围是
或
,其中
令
,则
关于
的函数表达式及
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bec550c01b4f075f22ab67f5e55ed5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61aa4ce711fedd61630396cc5a60c72e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb21edfbab740c06c38a9643442bf80f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3654254401fc902c3cb4912969f21f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4e71593587f76bc6f8cdd3dc54e605.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4399e23d12dad5caad185bdbf5ee5913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0a621a4886d7682be536a9b3638728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9686f26af78a1d42a24808ddab17d969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79a88996e4061409a58671b77241e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0a621a4886d7682be536a9b3638728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7eb449828552d859b80ceb6d3e0ada8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6310ab5dae1c53814dc65fc01b1211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7091d529281abff275ef19b9197445a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711bd7ed59701f6f8c54bbdb00364b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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【推荐2】定义:在平面直角坐标系
中,当点N在图形M上,且点N的纵坐标和横坐标相等时,则称这个点为图形M的“梦之点”.
是反比例函数
图象上的一个“梦之点”,则该函数图象上的另一个“梦之点”H的坐标是 ;
(2)如图,已知点A,B是抛物线
上的“梦之点”,点C是抛物线的顶点,连接
,判断
的形状,并说明理由:
(3)在
的范围内,若二次函数
的图象上至少存在一个“梦之点”,则m的取值范围是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05bb7fdb85315d810f67f31e7e94d7b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5698fdca52f0b841d952897c6621a05.png)
(2)如图,已知点A,B是抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effd04464cfb154a5b3862c80289e710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5aeeb9eaac7b451a89bfd337883acaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e482dd69ac1cf7f06552fdf25a217c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e46c1a5eea449eeab47e01682035b7.png)
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【推荐1】如图,已知正比例函数和反比例函数的图象都经过点A(﹣3,﹣3).
(1)求正比例函数和反比例函数的表达式;
(2)把直线OA向上平移后与反比例函数的图象交于点B(﹣6,m),与x轴交于点C,求m的值和直线BC的表达式;
(3)在(2)的条件下,直线BC与y轴交于点D,求以点A,B,D为顶点的三角形的面积;
(4)在(3)的条件下,点A,B,D在二次函数的图象上,试判断该二次函数在第三象限内的图象上是否存在一点E,使四边形OECD的面积S1与四边形OABD的面积S满足:S1=
S?若存在,求点E的坐标;若不存在,请说明理由.
(1)求正比例函数和反比例函数的表达式;
(2)把直线OA向上平移后与反比例函数的图象交于点B(﹣6,m),与x轴交于点C,求m的值和直线BC的表达式;
(3)在(2)的条件下,直线BC与y轴交于点D,求以点A,B,D为顶点的三角形的面积;
(4)在(3)的条件下,点A,B,D在二次函数的图象上,试判断该二次函数在第三象限内的图象上是否存在一点E,使四边形OECD的面积S1与四边形OABD的面积S满足:S1=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139e201f2295ed34d96183f7c467580f.png)
![](https://img.xkw.com/dksih/QBM/2018/9/4/2024977607229440/2025901042057216/STEM/bb79bad075d649a6bc1a4d3a5e87a076.png?resizew=164)
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较难
(0.4)
【推荐2】如图1,为美化校园环境,某校计划在一块长为60米,宽为40米的长方形空地上修建一个长方形花圃,并将花圃四周余下的空地修建成同样宽的通道,设通道宽为a米.
(2)如果花所占面积是整个长方形空地面积的
,求出此时通道的宽;
(3)已知某园林公司修建通道、花圃的造价
(元)、
(元)与修建面积x(
)之间的函数关系如图2所示,如果学校决定由该公司承建此项目,并要求花圃的面积要超过800平方米,那么通道宽为多少时,修建的通道和花圃的总造价为105920元?
(2)如果花所占面积是整个长方形空地面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6503ca085e3ca5f2ba723b0dd66e210b.png)
(3)已知某园林公司修建通道、花圃的造价
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
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