已知抛物线
交
轴于点
,过
作
轴,交抛物线于点
,
.
(1)求抛物线的解析式;
(2)如图1,如果点
是抛物线对称轴上的一点,抛物线上是否存在点
,使得以
为顶点的四边形是平行四边形?若存在,请直接写出所有满足条件的点
的坐标;若不存在,请说明理由;
(3)如图2,连接
,延长
交抛物线于点
,点
为
上方抛物线上的一个点,过点
作
轴的平行线交
于点
,作
于点
,请问是否存在点
,使得
的周长最长,若存在,请求出周长的最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa86d02ee9f1f8c86fbd699cc441cc4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07336cc4961c721ee1dbed27a92f23b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/959c30cd-071d-4fa6-872c-e3ee6db6930b.png?resizew=291)
(1)求抛物线的解析式;
(2)如图1,如果点
![](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/49cad684f09ce5fc0ce67f4f4875f211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08be05647521af79a0e1c6b5557552c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111dcad42ef861c2ab45bba36c1afa9f.png)
21-22九年级上·广东广州·阶段练习 查看更多[2]
广东省广州市黄广中学2021~2022学年九年级上学期月考数学试题(已下线)专题03 二次函数最值问题专项训练-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(广东专用)
更新时间:2023-08-03 22:45:44
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解答题-问答题
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【推荐1】在平面直角坐标系中,抛物线C1:y=a
+bx+c(a≠0)与x轴相交于点A(﹣6,0),B(﹣2,0)两点,与y轴交于点C(0,6),点D为抛物线
上的顶点.
(1)求抛物线
的函数表达式及顶点D的坐标;
(2)在x轴上有一点M(m,0),将抛物线
的图象绕点M旋转180°得到抛物线
,点C、D的对应点分别是
、
,若以C、D、
、
为顶点的四边形是菱形,求点M的坐标及抛物线
的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)在x轴上有一点M(m,0),将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
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【推荐2】如图,已知抛物线L:y=x2+bx﹣4交y轴于点A,交x轴于点B(﹣4,0)、C.抛物线L关于原点O对称的抛物线为
,点A在抛物线
上的对应点为A'.
(1)求抛物线
的函数表达式;
(2)过点
作平行于x轴的直线l,点P是抛物线
上一动点,过点P作PQ⊥l于Q,连接
.若
,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97514e967dcbf87026b4d1b915b0c28f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97514e967dcbf87026b4d1b915b0c28f.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97514e967dcbf87026b4d1b915b0c28f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d7ffb7889a31b267a85f1ea238138e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97514e967dcbf87026b4d1b915b0c28f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec18549be9b0f7a35761423636d8911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e2af31f32e25ebbeee489a74e9b939a.png)
![](https://img.xkw.com/dksih/QBM/2021/4/13/2698822613794816/2703265773043712/STEM/587231f1-d3e8-48b9-a40c-36dc8ab05ed7.png)
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【推荐1】如图,在矩形
中,
,
,动点
从点
出发.以
的速度沿射线
方向运动,以
为底边,在
的右侧作等腰直角三角形
,当点
落在射线
上时,点
停止运动,设
与矩形
重叠部分的面积为
,运动的时间为
.
(1)当
为何值时,点
落在射线
上;
(2)当线段
将
的面积二等分时,求
的值;
(3)求
与
的函数关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fb80b591b497d8d7a6d8592160de44.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/15/0604b7bc-1b2d-42a7-9827-341c2b8e7e65.png?resizew=136)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)当线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】如图①,正方形
中,点
是对角线
的中点,点
是线段
上(不与
,
重合)的一个动点,过点
作
且
交边
于点
.
(1)求证:
.
(2)如图②,若正方形
的边长为6,过
作
于点
,在
点运动的过程中,
的长度是否发生变化?若不变,试求出这个不变的值;若变化,请说明理由.
(3)如图③,直接写出线段
,
,
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/079feb0028639798bba5e205149a7601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/293c2c3c-a8e7-463b-8d9f-8dc124c8203d.png?resizew=460)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1330569b47697ad0897ff9fcabc590.png)
(2)如图②,若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
(3)如图③,直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐1】如图,顶点为C的抛物线y=ax2+bx(a>0)经过点A和x轴正半轴上的点B,连接OC、OA、AB,已知OA=OB=2,∠AOB=120°.
(1)求这条抛物线的表达式;
(2)过点C作CE⊥OB,垂足为E,点P为y轴上的动点,若以O、C、P为顶点的三角形与△AOE相似,求点P的坐标;
(3)若将(2)的线段OE绕点O逆时针旋转得到OE′,旋转角为α(0°<α<120°),连接E′A、E′B,求E′A+
E′B的最小值.
(1)求这条抛物线的表达式;
(2)过点C作CE⊥OB,垂足为E,点P为y轴上的动点,若以O、C、P为顶点的三角形与△AOE相似,求点P的坐标;
(3)若将(2)的线段OE绕点O逆时针旋转得到OE′,旋转角为α(0°<α<120°),连接E′A、E′B,求E′A+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://img.xkw.com/dksih/QBM/2018/11/21/2080289297178624/2081531339980800/STEM/822b5f0f35274276af3af915e8b65a58.png?resizew=477)
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【推荐2】如图1,在平面直角坐标系中,抛物线
与x轴交于点
,点
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/7b1bc797-8cfa-47af-b75e-e55cf0bcece4.jpg?resizew=365)
(1)求该抛物线的解析式;
(2)点P为直线
上方抛物线上的一点,过点P作![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
轴,交
于点D,点E是直线
上一点(点E位于
左侧),且
,连接
,求
周长的最大值以及此时点P的坐标;
(3)如图2,将抛物线向左平移,使得平移后的抛物线的对称轴为y轴,点M在直线
上,将直线
绕点M顺时针旋转
得到直线l,直线l与平移后抛物线的交点N位于直线
上方,Q为平面直角坐标系内一点,直接写出所有使得以点C,M,N,Q为顶点的四边形是菱形的点N的坐标,并把求其中一个点N的坐标的过程写出来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424468b791a1dc97c6f14ec65b29c126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2b1f4120365cb6ee4925fe417563f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e30645f36e8628b9e25d53598d5174.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/7b1bc797-8cfa-47af-b75e-e55cf0bcece4.jpg?resizew=365)
(1)求该抛物线的解析式;
(2)点P为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3245fe0ef32b7741d55fe5cf8fc6c45.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/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e577c748b403acfa435b280243a4710d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d06fad1ed5a452a835e9a02cb011ed2.png)
(3)如图2,将抛物线向左平移,使得平移后的抛物线的对称轴为y轴,点M在直线
![](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/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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【推荐1】如图,已知抛物线
与x轴交于点A,B两点,与y轴交于点C,点P是
上方抛物线上的一动点,作
轴于点M,点M的横坐标为
,交
于点D.
(1)求A,B的坐标和直线
的解析式;
(2)连接
,求
面积的最大值;
(3)已知点Q也在抛物线上,点Q的横坐标为
,作
轴于点F,交
于点E,若P,D,Q,E为顶点的四边形为平行四边形,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3236d825b994ee9c28e5d5479a57b8ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ef387a6d2a6fb560049ec54274eae3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/fc5ed640-d1c1-48ea-8a72-6a7c07472144.png?resizew=191)
(1)求A,B的坐标和直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31039dbbbcad3eaa3c85a3ddfeca2b3e.png)
(3)已知点Q也在抛物线上,点Q的横坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde47d197b05343b64bc5a94fd28254c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c53d25574bf402bacdc65a35e2b3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-问答题
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较难
(0.4)
名校
【推荐2】如图,抛物线
与
轴交于点
,点
,与
轴交于点
,点
与点
关于
轴对称,点
是
轴上的一个动点.设点
的坐标为
,过点
作
轴的垂线
交抛物线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/6413d5ad-4883-4f97-91b2-762501920119.png?resizew=421)
(1)求点
,
,
的坐标;
(2)当点
在线段
上运动时,直线
交
于点
,试探究
为何值时,四边形
是平行四边形;
(3)在点
的运动过程中,是否存在点
,使
是以
为直角边的直角三角形?若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31fb55fe9a895607f89b2c0e0b8dedaa.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/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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9c0002b13f6cae093cd9dc9f19941b.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/6413d5ad-4883-4f97-91b2-762501920119.png?resizew=421)
(1)求点
![](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)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/052ba6d08ab7d56a7fdf75d185b92825.png)
(3)在点
![](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/ab142c659d5434d88d7f6f5d994cfd18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】如图,抛物线
与直线AB交于点A(﹣1,0),B(4,
).点D是抛物线A,B两点间部分上的一个动点(不与点A,B重合),直线CD与y轴平行,交直线AB于点C,连接AD,BD.
(1)求抛物线的解析式;
(2)设点D的横坐标为m,△ADB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)当点D为抛物线的顶点时,若点P是抛物线上的动点,点Q是直线AB上的动点,判断有几个位置能使以点P,Q,C,D为顶点的四边形为平行四边形,直接写出相应的点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66629831fb9f2df59a69a7dbcf6274e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
(1)求抛物线的解析式;
(2)设点D的横坐标为m,△ADB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)当点D为抛物线的顶点时,若点P是抛物线上的动点,点Q是直线AB上的动点,判断有几个位置能使以点P,Q,C,D为顶点的四边形为平行四边形,直接写出相应的点Q的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/4071f9a1-b604-4e35-b88f-ec2861e3e697.png?resizew=227)
您最近一年使用:0次