如图,抛物线
与x轴交于A、B两点,与y轴交于点C,
,顶点为D.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/34e6139e-0dd0-41b0-b289-51e277aac8b2.png?resizew=384)
(1)求此函数的关系式;
(2)在
下方的抛物线上有一点N,过点N作直线
轴,交
于点M,当点N坐标为多少时,线段
的长度最大?最大是多少?
(3)在对称轴上有一点K,在抛物线上有一点L,若使A,B,K,L为顶点形成平行四边形,求出K,L点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8afcd896c25f11b18ea574b37b60d6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/34e6139e-0dd0-41b0-b289-51e277aac8b2.png?resizew=384)
(1)求此函数的关系式;
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25795c2dc456965454bdc16fd9c06e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)在对称轴上有一点K,在抛物线上有一点L,若使A,B,K,L为顶点形成平行四边形,求出K,L点的坐标.
更新时间:2024-01-25 15:37:48
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【推荐1】在平面直角坐标系中,抛物线
与
轴相交于
、
,交
轴于点
,点
抛物线的顶点,对称轴与
轴交于点
.
(1)求抛物线的解析式;
(2)如图1,连接
,点
是线段
上方抛物线上的一动点,
于点
;过点
作
轴于点
,交
于点
.点
是
轴上一动点,当
取最大值时.
①.求
的最小值;
②.如图2,
点是
轴上一动点,请直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/570f4d5fb02a23a06157ba44686f84f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求抛物线的解析式;
(2)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c9c9ccb1f2accde19b3ca9920a845c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b4e2ad842cdc7d86da465631ca77ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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://img.xkw.com/dksih/QBM/editorImg/2023/9/18/b20d0e61-36f8-41c9-9398-31c5b29b6a89.png?resizew=177)
①.求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660fccef2bb6651fecb9be00a0634f74.png)
②.如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43cc7d93a96113cb9201a69fc2c682d0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/123ef9da-e006-40d4-a8b6-57d4c1bda06a.png?resizew=175)
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【推荐2】如图,抛物线
与
轴交于A,
两点,且
,与
轴交于点
,连接
,抛物线对称轴为直线
,
为第一象限内抛物线上一动点,过点
作
于点
,与
交于点
,设点
的横坐标为
.
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964951763935232/2967380065320960/STEM/f7f5e97c8f6442d29d809c37180c7c68.png?resizew=347)
(1)求抛物线的表达式;
(2)当线段
的长度最大时,求
的值:
(3)点
是抛物线对称轴上的一点,点
是坐标平面内的一点,是否存在点
,使得以点
,
,
,
为顶点的四边形是菱形,若存在,请直接写出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abef063e1692494fd4769d100f044b8.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b650820d7bed48ed67a2869ad8c65ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964951763935232/2967380065320960/STEM/f7f5e97c8f6442d29d809c37180c7c68.png?resizew=347)
(1)求抛物线的表达式;
(2)当线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db25f96950925b1cc1a82e05fd28f5e.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】如图,抛物线y=ax2+bx+2与x轴交于点A(﹣1,0)和点B(2,0),与y轴交于点C.
(1)求该抛物线的函数解析式;
(2)如图1,连接BC,点D是BC上方抛物线上的动点,连接OD、CD,OD交BC于点F,当
时,求
的值;
(3)如图2,点E的坐标为
,在抛物线上是否存在点P,使∠OBP=2∠OBE?若存在,请求出符合条件的点P的横坐标;若不存在,请说明理由.
(1)求该抛物线的函数解析式;
(2)如图1,连接BC,点D是BC上方抛物线上的动点,连接OD、CD,OD交BC于点F,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffe8537d5a9c34579b88e9848bbe1fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f579c72ae028016cdebbee4220ab136.png)
(3)如图2,点E的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e09415a7fccb0ead1a8ce2176cb166.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/31bed4c9-26ba-44a3-a39b-97d745714560.png?resizew=368)
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【推荐2】在平面直角坐标系中,我们定义直线
为抛物线
(a、b、c为常数,a≠0)的“梦想直线”;有一个顶点在抛物线上,另有一个顶点在y轴上的三角形为其“梦想三角形”,已知抛物线
与其“梦想直线”交于A、B两点(点A在点B的左侧),与x轴负半轴交于点C.
(1)填空:该抛物线的“梦想直线”的解析式为 ,点A的坐标为 ,点B的坐标为 ;
(2)如图,点M为线段BC上一动点,将△ACM以AM所在直线为对称轴翻折,点C的对称点为N,若△AMN为该抛物线的“梦想三角形”,求点N的坐标;
(3)在该抛物线的“梦想直线”上,是否存在点P,使△ACP为等腰三角形?若存在,请直接写出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831c7ede06cf6892135c65d873da89d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f57c5d08e534712f29c041ee91478d.png)
(1)填空:该抛物线的“梦想直线”的解析式为 ,点A的坐标为 ,点B的坐标为 ;
(2)如图,点M为线段BC上一动点,将△ACM以AM所在直线为对称轴翻折,点C的对称点为N,若△AMN为该抛物线的“梦想三角形”,求点N的坐标;
(3)在该抛物线的“梦想直线”上,是否存在点P,使△ACP为等腰三角形?若存在,请直接写出点P的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/26/99256ecb-53df-47f2-844e-ab7cf2636c70.png?resizew=301)
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【推荐1】在平面直角坐标系中,抛物线y=
x2﹣
x+3与x轴交于A、B两点(点A在点B的左侧),交y轴于点C点D是抛物线上位于直线BC下方的一点.
(1)如图1,连接AD,CD,当点D的横坐标为5时,求S△ADC;
(2)如图2,过点D作DE
AC交BC于点E,求DE长度的最大值及此时点D的坐标;
(3)如图3,将抛物线y=
x2﹣
x+3向右平移个单位,再向下平移2个单位,得到新抛物线y'=ax2+bx+c.新抛物线与原抛物线的交点为点F,G为新抛物线的对称轴上的一点,点H是坐标平面内一点,若以C,F,G,H为顶点的四边形是矩形,请求出所有符合条件的点H坐标.
![](https://img.xkw.com/dksih/QBM/2021/5/9/2717107295985664/2721090588852224/STEM/867d6464c41c4687aa72ad26b87e9529.png?resizew=219)
![](https://img.xkw.com/dksih/QBM/2021/5/9/2717107295985664/2721090588852224/STEM/69c1ffb586d042eabf867046c9d06f23.png?resizew=222)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec85f29c0860b57a8f0cf8098c13a97e.png)
(1)如图1,连接AD,CD,当点D的横坐标为5时,求S△ADC;
(2)如图2,过点D作DE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(3)如图3,将抛物线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec85f29c0860b57a8f0cf8098c13a97e.png)
![](https://img.xkw.com/dksih/QBM/2021/5/9/2717107295985664/2721090588852224/STEM/867d6464c41c4687aa72ad26b87e9529.png?resizew=219)
![](https://img.xkw.com/dksih/QBM/2021/5/9/2717107295985664/2721090588852224/STEM/69c1ffb586d042eabf867046c9d06f23.png?resizew=222)
![](https://img.xkw.com/dksih/QBM/2021/5/9/2717107295985664/2721090588852224/STEM/52d6883154b54145a5f149d2cfa96d25.png?resizew=304)
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【推荐2】如图,已知抛物线
与x轴交于A,B两点(A点在B点的左边),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/ff3a3629-6c35-4230-9f12-77e9cc4a6caf.png?resizew=329)
(1)如图1,若△ABC为直角三角形,
①求n的值;
②P是抛物线上的一点,Q是抛物线的对称轴上的一点,若以点B、C、P、Q为顶点的四边形是平行四边形,请直接写出符合条件的点P的坐标;
(2)如图2,过点B作BC的垂线BD分别交抛物线和y轴于点D、E,且BE=ED,求n的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b5607444b4f48db82907ae02ed36e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/ff3a3629-6c35-4230-9f12-77e9cc4a6caf.png?resizew=329)
(1)如图1,若△ABC为直角三角形,
①求n的值;
②P是抛物线上的一点,Q是抛物线的对称轴上的一点,若以点B、C、P、Q为顶点的四边形是平行四边形,请直接写出符合条件的点P的坐标;
(2)如图2,过点B作BC的垂线BD分别交抛物线和y轴于点D、E,且BE=ED,求n的值.
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