如图①,抛物线
与x轴交于A(﹣1,0),B(3,0)两点,与y轴交于点C.
的解析式;
(2)如图②,连接BC,点E是第四象限内抛物线上的动点,过点E作EF⊥BC于点F,EG
y轴交BC于点G,求△EFG面积的最大值及此时点E的坐标;
(3)如图③,若抛物线的顶点坐标为点D,点P是抛物线对称轴上的动点,在坐标平面内是否存在点Q,使得以B,D,P,Q为顶点的四边形是菱形?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/3f6e5167890653f30ced6f8b69d68389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede5950d9486520bf8bb0f0044bb343a.png)
(2)如图②,连接BC,点E是第四象限内抛物线上的动点,过点E作EF⊥BC于点F,EG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
(3)如图③,若抛物线的顶点坐标为点D,点P是抛物线对称轴上的动点,在坐标平面内是否存在点Q,使得以B,D,P,Q为顶点的四边形是菱形?若存在,求出点P的坐标;若不存在,请说明理由.
更新时间:2022-09-10 01:56:22
|
相似题推荐
解答题-问答题
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困难
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【推荐1】如图,抛物线y=ax2+bx+4与x轴相交于点A(4
,0),B(﹣
,0),与y轴相交于点C,抛物线的对称轴与x轴相交于点D,点P是x轴上的一个动点,连接CP,并把线段CP绕着点C按逆时针方向旋转60°,得到CQ,连接PQ,OQ.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/5/d6a4a953-6f8c-4b61-abc1-94f7e1ba76f9.png?resizew=466)
(1)求抛物线的解析式;
(2)当点P运动到点D时,求Q点坐标,并判断点Q是否在抛物线上;
(3)当△OPQ的面积等于
时,请直接写出符合条件的点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/5/d6a4a953-6f8c-4b61-abc1-94f7e1ba76f9.png?resizew=466)
(1)求抛物线的解析式;
(2)当点P运动到点D时,求Q点坐标,并判断点Q是否在抛物线上;
(3)当△OPQ的面积等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e162b98c280720fcb909cf392fda3.png)
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【推荐2】在平面直角坐标系中,点
为坐标原点,抛物线
与
轴交于
,
,与
轴交于点
,顶点为点
.
(1)求该抛物线的解析式;
(2)如图,连接
,点
是
延长线上一点,连接
,
,设点
的横坐标为
,
的面积为
,求
与
之间的函数解析式(不要求写自变量
的取值范围);
(3)在(2)的条件下,当
时,点
是抛物线上第四象限内一点,连接
,过点
作
轴交
于点
,过点
作
轴于点
,连接
并延长交
轴于点
,连接
,
,若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c119eba6bc8434123efc698b0d5930b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c33700c3358cbbd8db376f9f0613b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbb898663f98b8400a897913b4d3102.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/editorImg/2024/4/2/60af290f-0d6b-41d0-a773-13dc24c6bcbf.png?resizew=591)
(1)求该抛物线的解析式;
(2)如图,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74625390340982140e449e07663579a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632e75c35617a2ea7903ae2b1d7a55e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff86ca2de3dd3592e013ff0e43b472e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff95970af540cc15b7de34dcb670f3c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3d566704b44ea4ef1f99c37bd46902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8579fdffd939a8820236c5f4b3a077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐1】已知:如图,在矩形
中,
,
,对角线
,
交于点
.点
从点
出发,沿
方向匀速运动,速度为
;同时,点
从点
出发,沿
方向匀速运动,速度为
;当一个点停止运动时,另一个点也停止运动.连接
并延点也长,交
于点
,过点
作
,交
于点
.设运动时间为
,解答下列问题:
![](https://img.xkw.com/dksih/QBM/2021/1/15/2636818923405312/2638281830014976/STEM/04e867f6d78e4ecca5c01457b1e37759.png?resizew=207)
(1)当
时,
______;
(2)当
为何值时,
是等腰三角形?
(3)设五边形
的面积为
,试确定
与
的函数关系式;
(4)在运动过程中,是否存在某一时刻
,使
平分
?若存在,直接写出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6747441b260ca043446b5d472fece440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432043f79e122f291c47453013042704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fbdc4c5bbda8fab18359ab53cebc9d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afc22712498724b28f172a9893157de.png)
![](https://img.xkw.com/dksih/QBM/2021/1/15/2636818923405312/2638281830014976/STEM/04e867f6d78e4ecca5c01457b1e37759.png?resizew=207)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e7c55be134c84ba26e49d1db5499a07.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
(3)设五边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bebf830e398a2deadaa81b1d137dd64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab9091bc1886a3fd3d17160b2d41ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)在运动过程中,是否存在某一时刻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f5dc1d043a4909a40238ff5b590c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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名校
【推荐2】如图1,抛物线y=﹣x2+bx+c经过点A,B,C,已知点A和C的坐标分别是(﹣4,0)和(0,4),点P在抛物线y=﹣x2+bx+c上.
(1)求抛物线的解析式及顶点D的坐标;
(2)如图2,当点P在线段AC的上方,点P的横坐标记为t,过点P作PM⊥AC于点M,当PM=
时,求点P的坐标;
(3)若点E是抛物线对称轴上与点D不重合的一点,F是平面内的一点,当四边形CPEF是正方形时,求点P的坐标.
(1)求抛物线的解析式及顶点D的坐标;
(2)如图2,当点P在线段AC的上方,点P的横坐标记为t,过点P作PM⊥AC于点M,当PM=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(3)若点E是抛物线对称轴上与点D不重合的一点,F是平面内的一点,当四边形CPEF是正方形时,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/2020/2/14/2399014936092672/2399721893437440/STEM/acde5a8b5f2e4c4bba2b456e681e95a9.png?resizew=239)
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(0.15)
【推荐3】在平面直角坐标系中,
为坐标原点,点
、
在抛物线
上,点
为该抛物线的顶点.点
为该抛物线上一点,其横坐标为
.
(1)求该抛物线对应的函数关系式.
(2)连接
,当
轴时,顺次连接点
、
、
、
,求四边形
的面积.
(3)当
时,设该抛物线在点
与点
之间(包含点
和点
)的部分图像的最低点和最高点到
轴的距离分别为
、
,若
,求
的取值范围.
(4)当点
在第四象限时,作点
关于点
的对称点
,以
为对角线构造矩形
,该矩形的边均与坐标轴垂直,且点
、
在该矩形的内部.设抛物线在该矩形内部及边界的图像记为
,图像
的最高点与最低点的纵坐标之差为
,最低点在该矩形边所在的直线记为
,若点
到直线
的距离等于
,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78898fc5553d8136c54a2efccc79f300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c468dc5cc34c14a188493a21019e8f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)求该抛物线对应的函数关系式.
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8959afc9f2b1b7d80982f4ce2c5bd04.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b027ed57b9c6f24e27ec0ae282c76efa.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](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/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2233c80e25dcdb767273d468216a94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(4)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558018427b91c4f440788ab031fbbdfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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