已知抛物线
过点
和点
,与
轴交于点
.
(1)求抛物线的解析式;
(2)如图1,连接
,点
在线段
上(与点
不重合),点
是
的中点,连接
,过点
作
交
于点
,连接
,当
面积是
面积的3倍时,求点
的坐标;
(3)如图2,点
是抛物线上对称轴右侧的点,
是
轴正半轴上的动点,若线段
上存在点
(与点
不重合),使得
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a31bc26ae2a56d4d19789fd3c03ac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de9dca01064b9578f28be610bb341e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56d9b86ac331775206c9230d7ffe7af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/22/216067b8-07cb-4ff1-ad56-283053ee16b1.png?resizew=329)
(1)求抛物线的解析式;
(2)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcc853d290b852b99ebb0cef816412a.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc853037dd2de4bfe26300947cc5b5e0.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc62c28c53286cd17e9eb997af7221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1d3ade964f9a03a3ba36416a61485c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2023-06-21 15:30:46
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相似题推荐
解答题-问答题
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困难
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名校
【推荐1】在平面直角坐标系中,抛物线
过点
和点
,交x轴于A,B两点(点A在点B的左侧),顶点为C.
(2)如图1,点P为直线BC上方抛物线上一动点,过点P作
交
于点E,作
轴交抛物线于点F,求
的最大值及此时点P的坐标;
(3)如图2,将抛物线y沿射线
的方向平移
个单位长度得到新抛物线
,
的对称轴交x轴于点H,D为
的顶点,M为
对称轴右侧图象上的一点,N为
对称轴上的一点,当
时,直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2375a27ead9549550676d4e6a2b47243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26b2f4deff9ed2bfacd993194c8a32f.png)
(2)如图1,点P为直线BC上方抛物线上一动点,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2ef99db257cc1acb08e3a5e0006d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65899adab76c4c52af43eb89c22767fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99eb46461342377acaeb1c57a5c7d1d5.png)
(3)如图2,将抛物线y沿射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a8a2046e41c8384d0efd33dbe80a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74a7b31c38b453fe5ba677ff31193051.png)
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【推荐2】如图1,在平面直角坐标系中,抛物线
与x轴分别交于
两点,与y轴交于点
,顶点为点G,连接
,点P为直线
上方抛物线上一动点,连接
交
于点M.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/3dba5004-9b46-451e-9bb7-333c32eb345b.jpg?resizew=191)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/378cac12-6c9d-4f7b-8c52-16d352eac823.jpg?resizew=191)
(1)求抛物线的函数表达式及顶点G的坐标;
(2)求
的面积的最大值并写出P点坐标;
(3)如图2,在(2)的条件下,
是此抛物线对称轴上长为2的一条动线段(点E在点F上方),连接
,当四边形
周长取最小值时,求点E的坐标______.在此条件下,以点G、E、H、P为顶点的四边形为平行四边形,直接写出点H的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/273d64152881614f572c51a9819529ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f845a7c69953429bd6228ac76f6848ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ed1fce01430ae31294c29d626626f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/3dba5004-9b46-451e-9bb7-333c32eb345b.jpg?resizew=191)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/378cac12-6c9d-4f7b-8c52-16d352eac823.jpg?resizew=191)
(1)求抛物线的函数表达式及顶点G的坐标;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fa5b7ee3c02add5668fcdfd13e4b6f.png)
(3)如图2,在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9061c29abeb16ec9b9a43a8045e7b5f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
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【推荐3】如图,已知抛物线y=a(x+6)(x﹣2)过点C(0,2),交x轴于点A和点B(点A在点B的左侧),抛物线的顶点为D,对称轴DE交x轴于点E,连接EC.
(1)直接写出a的值,点A的坐标和抛物线对称轴的表达式;
(2)若点M是抛物线对称轴DE上的点,当△MCE是等腰三角形时,求点M的坐标;
(3)点P是抛物线上的动点,连接PC,PE,将△PCE沿CE所在的直线对折,点P落在坐标平面内的点P′处.求当点P′恰好落在直线AD上时点P的横坐标.
(1)直接写出a的值,点A的坐标和抛物线对称轴的表达式;
(2)若点M是抛物线对称轴DE上的点,当△MCE是等腰三角形时,求点M的坐标;
(3)点P是抛物线上的动点,连接PC,PE,将△PCE沿CE所在的直线对折,点P落在坐标平面内的点P′处.求当点P′恰好落在直线AD上时点P的横坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/0b041d78-2906-41d9-813a-573ab4ddd371.png?resizew=218)
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【推荐1】如图甲,在△ABC中,∠ACB为锐角.点D为射线BC上一动点,连接AD,以AD为一边且在AD的右侧作正方形ADEF.解答下列问题:
![](https://img.xkw.com/dksih/QBM/2012/9/21/1573521921933312/1573521966161920/STEM/e0ec5241-fc63-4475-afc0-7d73541ab7d8.png?resizew=766)
(1)如果AB=AC,∠BAC=90º.
①当点D在线段BC上时(与点B不重合),如图乙,线段CF、BD之间的位置关系为 ,数量关系为 .
②当点D在线段BC的延长线上时,如图丙,①中的结论是否仍然成立,为什么?
(2)如果AB≠AC,∠BAC≠90º,点D在线段BC上运动.
试探究:当△ABC满足一个什么条件时,CF⊥BC(点C、F重合除外)?画出相应图形,并说明理由.(画图不写作法)
(3)若AC=
,BC=3,在(2)的条件下,设正方形ADEF的边DE与线段CF相交于点P,求线段CP长的最大值.
![](https://img.xkw.com/dksih/QBM/2012/9/21/1573521921933312/1573521966161920/STEM/e0ec5241-fc63-4475-afc0-7d73541ab7d8.png?resizew=766)
(1)如果AB=AC,∠BAC=90º.
①当点D在线段BC上时(与点B不重合),如图乙,线段CF、BD之间的位置关系为 ,数量关系为 .
②当点D在线段BC的延长线上时,如图丙,①中的结论是否仍然成立,为什么?
(2)如果AB≠AC,∠BAC≠90º,点D在线段BC上运动.
试探究:当△ABC满足一个什么条件时,CF⊥BC(点C、F重合除外)?画出相应图形,并说明理由.(画图不写作法)
(3)若AC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
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【推荐2】综合应用.
已知抛物线
与x轴交于
,
两点,与y轴交于点C,点P是抛物线上一动点.
(2)如图1,当点
是第一象限内且在
上方的动点,连接
,交
于点
,若
,求点
的坐标;
(3)如图2,若点
在直线
下方的抛物线上,过点
作
,垂足为
,求
的最大值.
已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d1e4a02f6a99a4b838dcaf9541d7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fff64ee6ea236550185efc7ed1b598.png)
(2)如图1,当点
![](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/20a541b81584a032f571159ea152c85a.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/7ae99cc847748a1063eaca1d5aab9820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图2,若点
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f24325565a9dd95128a633a240da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abac9879eb15c0aa1a44885424ef51e5.png)
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【推荐1】如图,已知直线y=
与坐标轴交于A,B两点,以线段AB为边向上作正方形ABCD,过点A,D,C的抛物线与直线的另一个交点为E.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424480198656/2927416132902912/STEM/bcdbf37f-c5c4-43e9-a3c9-fee2ef6a4295.png?resizew=444)
(1)求抛物线的解析式;
(2)若正方形以每秒
个单位长度的速度沿射线AB下滑,直至顶点D落在x轴上时停止,设正方形落在x轴下方部分的面积为S,求S关于滑行时间t的函数关系式,并写出相应自变量t的取值范围;
(3)在(2)的条件下,抛物线与正方形一起平移,同时停止,求抛物线上C,E两点间的抛物线弧所扫过的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd39240959596ea3729994363e8e243.png)
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424480198656/2927416132902912/STEM/bcdbf37f-c5c4-43e9-a3c9-fee2ef6a4295.png?resizew=444)
(1)求抛物线的解析式;
(2)若正方形以每秒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
(3)在(2)的条件下,抛物线与正方形一起平移,同时停止,求抛物线上C,E两点间的抛物线弧所扫过的面积.
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【推荐2】如图,在矩形ABCD中,AB=4,BC=3,点Q在BC上,BQ=2,点P是AB上的一个动点,连接PQ,将△PBQ沿PQ翻折,点B落在点B′.
![](https://img.xkw.com/dksih/QBM/2019/10/16/2313299873660928/2313907442982913/STEM/3f646e2852684e4fb95e976949ccfeb6.png?resizew=283)
(1)当AP= 时,四边形PBQB′的面积是矩形面积的
;
(2)当AP为何值时,四边形PBQB′是正方形?为什么?
(3)在翻折过程中是否存在AP的值,使得点B′与矩形对称中心点O重合,如果存在,请求出AP的值;如果不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2019/10/16/2313299873660928/2313907442982913/STEM/3f646e2852684e4fb95e976949ccfeb6.png?resizew=283)
(1)当AP= 时,四边形PBQB′的面积是矩形面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)当AP为何值时,四边形PBQB′是正方形?为什么?
(3)在翻折过程中是否存在AP的值,使得点B′与矩形对称中心点O重合,如果存在,请求出AP的值;如果不存在,请说明理由.
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【推荐1】如图1,抛物线
与x轴相交于A,B两点(点A在点B的右侧),与y轴交于点C,点D是抛物线的顶点,连接
、
.
(1)求
的面积;
(2)如图2,连接
、
,若点P是直线
上方抛物线上一动点,过P作
交
于点E,作
轴交
于点Q,当
周长最大时,将
沿着直线
平移,记移动中的
为
,连接
,求
的周长的最大值及
的最小值;
(3)如图3,点G为x轴正半轴上一点,且
,连接
,过G作
于点H,将
绕点O顺时针旋转
(
),记旋转中的
为
,在旋转过程中,直线
,
分别与直线
交于点M,N,
能否成为等腰三角形?若能直接写出所有满足条件的
的值;若不能,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/11b8a273-1dc0-40e6-976a-032b19c94244.png?resizew=626)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797fae36d290753fa9924127859f3b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b73db43b2ded725b5ec0fde022b32c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f27083267432a9352fb6677a07d461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5845d0b7ca6980eea65473c0de995de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5845d0b7ca6980eea65473c0de995de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5845d0b7ca6980eea65473c0de995de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ad63ca032e63d820d980ab082d1058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a630858806f18ca3aafd1ff1383531f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5845d0b7ca6980eea65473c0de995de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dafd43796135ef6837fd0d16a52ef58.png)
(3)如图3,点G为x轴正半轴上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5fb4c9279f0f1b0bdc2947341baca15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3f8b5c2dba20d42a8c551cd75a38fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bde5e96c203f387b2004b4abf5f839f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e915c7310f3781887a1afb99dbf949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bde5e96c203f387b2004b4abf5f839f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f974e02928e5da67340790355a7db13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b69864c3ffcdf67221ce2dff2148a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c3c5c5390d665894e28dfea828e7af5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1ac51526b63dfe40b11758684143e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/11b8a273-1dc0-40e6-976a-032b19c94244.png?resizew=626)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图,平面直角坐标系中,O是坐标原点,抛物线
与x轴交于A,B两点(A点在点B的左侧),点B坐标是
,抛物线与y轴交于点C
,点P是抛物线的顶点,连接PC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/91ee07df-c4cc-4aab-ac6b-7d37026f2c5d.png?resizew=400)
(1)抛物线的函数表达式,并直接写出顶点P的坐标;
(2)直线BC与抛物线的对称轴交于点D,点Q为直线BC上一动点;
①当
的面积等于
面积的2倍时,求点Q的坐标;
②在①的条件下,当点Q在x轴上方时,过点Q作直线L垂直于AQ,直接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6a27a9d5d345f1e04020bfea2770ac.png)
交直线L于点F,点G在直线
,且
时,请直接写出GF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d84f1a24f6fa62a92cab4b89990b7f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789658ec5099190cec8f9b4fe558b432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64077886aa56ec9690f6e5803787f8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/91ee07df-c4cc-4aab-ac6b-7d37026f2c5d.png?resizew=400)
(1)抛物线的函数表达式,并直接写出顶点P的坐标;
(2)直线BC与抛物线的对称轴交于点D,点Q为直线BC上一动点;
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e8c7968d57d2a20065a7cb15c9b4eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
②在①的条件下,当点Q在x轴上方时,过点Q作直线L垂直于AQ,直接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6a27a9d5d345f1e04020bfea2770ac.png)
交直线L于点F,点G在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4a0a530bd5f4075f4abe25484024c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2ce1ef16e2cee18132bac3bbb7b6bd.png)
您最近一年使用:0次