在平面直角坐标系中,抛物线y =ax2+bx-3与x轴交于点A(-1,0)和点B(3,0),与y轴交于点C.
(2)若点P为第四象限内抛物线上一点,当△PBC面积最大时,求点P的坐标;
(3)若点P为抛物线上一点,点Q是线段BC上一点(点Q不与两端点重合),是否存在以P、Q、O为顶点的三角形是等腰直角三角形,若存在,请直接写出满足条件的点P的坐标;若不存在,请说明理由.
(2)若点P为第四象限内抛物线上一点,当△PBC面积最大时,求点P的坐标;
(3)若点P为抛物线上一点,点Q是线段BC上一点(点Q不与两端点重合),是否存在以P、Q、O为顶点的三角形是等腰直角三角形,若存在,请直接写出满足条件的点P的坐标;若不存在,请说明理由.
更新时间:2024-04-15 17:11:36
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相似题推荐
解答题-问答题
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较难
(0.4)
名校
【推荐1】如图1,直线
交
轴于点
,交
轴于点
,过
、
两点的抛物线
与
轴的另一交点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/3dacdf8c-0205-448d-8323-ea574dffde24.png?resizew=535)
(1)请直接写出该抛物线的函数解析式;
(2)点
是第二象限抛物线上一点,设
点横坐标为
.
①如图2,连接
,
,
,求
面积的最大值;
②如图3,连接
,将线段
绕
点顺时针旋转
,得到线段
,过点
作
轴交直线
于
.求线段
的最大值及此时点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9427de5d22d37859a110dbb234313c1.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/3dacdf8c-0205-448d-8323-ea574dffde24.png?resizew=535)
(1)请直接写出该抛物线的函数解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
①如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a9ec45721f7b4d1c99917ac0d970f.png)
②如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c782675efb07943bcee0339945a08711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】在平面直角坐标系中,设二次函数
(
是实数)
(1)当
时,若点
在该函数图象上,求
的值.
(2)已知
,
,
,从中选择一个点作为该二次函数图象的顶点,判断此时
是否在该二次函数的图象上.
(3)已知点
,
都在该二次函数图象上,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d95c312aab7918ac83bd168cfcc177.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706f7e3ec54d1e157943e990a8b4f5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f7bf0759ac4d7695acd7a9d5d0e77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c759374c2a222598d93e60b42c4f8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf99602ca5fdec80be241616453e16a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b99663061922344c18dec5093deaf3.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f39ad030ce2753cd07b9224460d6d88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea136a150856870e94bd237366f6b1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005564f0423ca8175210cc256f65efdb.png)
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解答题-问答题
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较难
(0.4)
【推荐1】在平面直角坐标系中,抛物线
与x轴交于
、
两点且经过点
,已知
点坐标为
.
点坐标为
.
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146517993496576/3161186156167168/STEM/9bf747f4288840bb9c876bc2acf7cfed.png?resizew=527)
(1)求抛物线的解析式;
(2)如图1,点
为第四象限内抛物线上一个动点,连接
、
,
,过点
作
交
于点
,连接
.请求出
面积的最大值以及此时点
的坐标;
(3)如图2,将抛物线
沿射线
方向平移
个单位长度得到新抛物线
,记
与
的交点为
,点
是直线
与
轴的交点,点
为直线
上一点,点
为平面内一点,若以
、
、
、
为顶点的四边形是菱形且
为菱形的边,请直接写出点
的坐标并选择其中一个坐标写出求解过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b473ca719ebceaad3ccf097bb944f938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226167aa0211b073d3504b751323f30d.png)
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146517993496576/3161186156167168/STEM/9bf747f4288840bb9c876bc2acf7cfed.png?resizew=527)
(1)求抛物线的解析式;
(2)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cf52a3bca91ef0624fa2aa8aa41d08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2ba29d612d3336d59628f364832bf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图2,将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.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/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef9d0784478511736255074b9395fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】如图,抛物线
经过
、
两点,与
轴的另一个交点为
,点
在
轴上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/9de3fc50-5fb2-46e9-93ee-4dd0967013fe.png?resizew=318)
(1)求该抛物线的表达式;
(2)设该抛物线上的一个动点
的横坐标为
.
①当
时,求四边形
的面积
与
的函数关系式,并求出
的最大值;
②点
在直线
上,若以
为边,点
、
、
、
为顶点的四边形是平行四边形,请求出所有符合条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62855ff21228ecea8e28fd0fbeb814ee.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e09ccf116333d550129771dd027246.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/9de3fc50-5fb2-46e9-93ee-4dd0967013fe.png?resizew=318)
(1)求该抛物线的表达式;
(2)设该抛物线上的一个动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56ba04145de9f760f274f5af8351eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d8cad5b34e3269db5f683329111bc4.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/cf231f8f86fb922df4ca0c87f044cec3.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】x、y是一个函数的两个变量,若当a≤x≤b时,有a≤y≤b(a<b),则称此函数为a≤x≤b上的闭函数.如y=﹣x+3,当x=1时y=2;当x=2时y=1,即当1≤x≤2时,1≤y≤2,所以y=﹣x+3是1≤x≤2上的闭函数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/a97c62ac-4d6e-4421-a000-164460b15676.png?resizew=237)
(1)请说明
是1≤x≤30上的闭函数;
(2)已知二次函数y=x2+4x+k是t≤x≤﹣2上的闭函数,求k和t的值;
(3)在(2)的情况下,设A为抛物线顶点,B为直线x=t上一点,C为抛物线与y轴的交点,若△ABC为等腰直角三角形,请直接写出它的腰长为 .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/a97c62ac-4d6e-4421-a000-164460b15676.png?resizew=237)
(1)请说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb252ab8c8a64d90d6395f626e83ebd5.png)
(2)已知二次函数y=x2+4x+k是t≤x≤﹣2上的闭函数,求k和t的值;
(3)在(2)的情况下,设A为抛物线顶点,B为直线x=t上一点,C为抛物线与y轴的交点,若△ABC为等腰直角三角形,请直接写出它的腰长为 .
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
【推荐2】在直角坐标系中,把点A(-1,a)(a为常数)向右平移4个单位得到点A′,经过点A、A′的抛物线y=ax2+bx+c与y轴的交点的纵坐标为2.
(1)求这条抛物线的解析式;
(2)设该抛物线的顶点为点P,点B的坐标为(1,m),且m<3,若△ABP是等腰三角形,求点B的坐标.
(1)求这条抛物线的解析式;
(2)设该抛物线的顶点为点P,点B的坐标为(1,m),且m<3,若△ABP是等腰三角形,求点B的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/74730abd-60ea-4f45-b9e8-c95a66333cbb.png?resizew=368)
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