如图,抛物线
与x轴相交于A(1,0),B(5,0),与y轴相交于点C,对称轴与x轴相交于点M.P是抛物线上一个动点(点P、M、C不在同一条直线上),分别过点A、B作AD⊥CP,BE⊥CP,垂足分别为点D、E,连接MD、ME.
(1)求抛物线的解析式;
(2)若点P在第一象限内,使
,求点P的坐标;
(3)点P在运动过程中,△MDE能否为等腰直角三角形?若能,求出此时点P的坐标;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b736d8cb466f0dad19f905000aba4da0.png)
(1)求抛物线的解析式;
(2)若点P在第一象限内,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04bd9a7f94b870000ad29263ba610290.png)
(3)点P在运动过程中,△MDE能否为等腰直角三角形?若能,求出此时点P的坐标;若不能,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/04fb92fe-f1c7-4ff8-903b-a8bd62e5fc4b.png?resizew=492)
更新时间:2017-06-18 22:29:49
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相似题推荐
解答题-应用题
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【推荐1】如图,在平面直角坐标系
中,直线
的函数表达式为
,
为常数),点
、
分别在
轴和
轴上,且
,点
关于
轴的对称点为
,点
关于
轴的对称点为
,以点
为顶点的抛物线经过点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/7/d6f3e4f1-55f3-4657-a07d-7ec05503ad72.png?resizew=126)
(1)求点
的坐标;
(2)求抛物线的解析式;
(3)在(2)中拋物线的对称轴上有一点
,且以点
为顶点的三角形与
相似,求出所有满足条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc1ea33eefbdadb982e1d01bcde0d5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abef063e1692494fd4769d100f044b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/8455657dde27aabe6adb7b188e031c11.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/2024/2/7/d6f3e4f1-55f3-4657-a07d-7ec05503ad72.png?resizew=126)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(2)求抛物线的解析式;
(3)在(2)中拋物线的对称轴上有一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f912a4288dad5afb0fbf33b8c7e9e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】综合与探究
如图,抛物线
经过点
和点
,点
是线段
上一动点(不与
重合),直线
是抛物线的对称轴,设点
的横坐标为
.
的函数表达式.
(2)当点
在直线
右侧的线段部分上运动时,过点
作
轴的垂线交抛物线于点
,分别过点
作直线
的垂线,垂足分别为
,求四边形
周长的最大值.
(3)若点
是抛物线上一点,平面内是否存在点
,使得以点
为顶点的四边形是正方形时,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.
如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ea0638778c13f3308d5b93ecd995f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d073c1fafc7fb931521c0f81af2eea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ad58997b9dc0b341c9af08f0cd1fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa69fd8445d01c98634c2e885b47d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3dac3f1a7727e2b848e5881a03a8bf.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531725c06840afdd249f32b745045880.png)
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解题方法
【推荐1】如图1,AB⊥BC,分别过点A,C作BM的垂线,垂足分别为M,N.
![](https://img.xkw.com/dksih/QBM/2020/4/21/2446052843995136/2446174876975104/STEM/f0f5fdb9f9684d669b113677aee7ee21.png?resizew=308)
(1)求证:BM•BC=AB•CN;
(2)若AB=BC.
①如图2,若BM=MN,过点A作AD∥BC交CM的延长线于点D,求DN:CN的值;
②如图3,若BM>MN,延长BN至点E,使BM=ME,过点A作AF∥BC交CE的延长线于点F,若E是CF的中点,且CN=1,直接写出线段AF的长.
![](https://img.xkw.com/dksih/QBM/2020/4/21/2446052843995136/2446174876975104/STEM/f0f5fdb9f9684d669b113677aee7ee21.png?resizew=308)
(1)求证:BM•BC=AB•CN;
(2)若AB=BC.
①如图2,若BM=MN,过点A作AD∥BC交CM的延长线于点D,求DN:CN的值;
②如图3,若BM>MN,延长BN至点E,使BM=ME,过点A作AF∥BC交CE的延长线于点F,若E是CF的中点,且CN=1,直接写出线段AF的长.
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【推荐2】如图,已知
中,
,D为斜边
的中点,连接
.过C点做
的垂线,并在这条线上(C的下方)截取
,连接
.
(2)证明:
;
(3)用等式表示
、
和
的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af9343e86e503de88b3f4682647a994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fb8c737bca3a8ff71fd1e2112ba043.png)
(3)用等式表示
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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【推荐1】如图,在平面直角坐标系中,直线
与x轴,y轴相交于A,B两点,点C的坐标是
.连接AC,BC.
![](https://img.xkw.com/dksih/QBM/2022/4/8/2953714910707712/2956612209270784/STEM/3c187fb0-08f2-4909-b968-bbe1941b1cf6.png?resizew=184)
(1)求过O,A,C三点的抛物线的函数表达式,并判断△ABC的形状;
(2)动点P从点O出发,沿OB以每秒2个单位长度的速度向点B运动;同时,动点Q从点B出发,沿BC以每秒1个单位长度的速度向点C运动.规定其中一个动点到达端点时,另一个动点也随之停止运动.设运动时间为ts,当t为何值时,
BPQ的面积最大?
(3)当抛物线的对称轴上有一点M,使以A,B,M为顶点的三角形是等腰三角形时,求出点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ac26e96e88e534c9e868452d5082ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee05fdbfca9281f1eb74e11c8144938.png)
![](https://img.xkw.com/dksih/QBM/2022/4/8/2953714910707712/2956612209270784/STEM/3c187fb0-08f2-4909-b968-bbe1941b1cf6.png?resizew=184)
(1)求过O,A,C三点的抛物线的函数表达式,并判断△ABC的形状;
(2)动点P从点O出发,沿OB以每秒2个单位长度的速度向点B运动;同时,动点Q从点B出发,沿BC以每秒1个单位长度的速度向点C运动.规定其中一个动点到达端点时,另一个动点也随之停止运动.设运动时间为ts,当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(3)当抛物线的对称轴上有一点M,使以A,B,M为顶点的三角形是等腰三角形时,求出点M的坐标.
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【推荐2】如图,二次函数
与
轴交于
、
两点,与
轴交于点
,点
是
轴上一点.
(1)求抛物线的解析式;
(2)若
,求点
的坐标;
(3)若
,过点
的直线
(
)与抛物线交于
、
两点(
在
的左侧).当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da50ebd2656745259525c8b157e389e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/723e5d013b530c3b52e1fc0b6f69e383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/f5319e60-d7f9-4f80-b532-9c3bb27aa718.png?resizew=260)
(1)求抛物线的解析式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d4a170ed1a896ef72ff684a784b3a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60f7441172407b19e9e61b85a0170d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8829770dd5a85c2ecaf82edea669869d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926d4683d62a4f41e8e512b5b60f3569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐1】如图,直线y=﹣
x+n交x轴于点A,交y轴于点C(0,4),抛物线y=
x2+bx+c经过点A,交y轴于点B(0,﹣2).点P为抛物线上一个动点,过点P作x轴的垂线PD,过点B作BD⊥PD于点D,连接PB,设点P的横坐标为m.
(1)求抛物线的解析式;
(2)当△BDP为等腰直角三角形时,求线段PD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
(1)求抛物线的解析式;
(2)当△BDP为等腰直角三角形时,求线段PD的长.
![](https://img.xkw.com/dksih/QBM/2019/3/2/2151391716646912/2152418094137344/STEM/ec12b0989f9947f68959273af07006d8.png?resizew=319)
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【推荐2】如图,在△ABC中,∠BAC=90°, BC∥x轴,抛物线y=ax2-2ax+3经过△ABC的三个顶点,并且与x轴交于点D、E,点A为抛物线的顶点.
![](https://img.xkw.com/dksih/QBM/2014/7/17/1573739136131072/1573739141799936/STEM/77dbf0be030b4c78979c1f47176f0ece.png)
(1)求抛物线的解析式;
(2)连接CD,在抛物线的对称轴上是否存在一点P使△PCD为直角三角形,若存在,求出所有符合条件的点P的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2014/7/17/1573739136131072/1573739141799936/STEM/77dbf0be030b4c78979c1f47176f0ece.png)
(1)求抛物线的解析式;
(2)连接CD,在抛物线的对称轴上是否存在一点P使△PCD为直角三角形,若存在,求出所有符合条件的点P的坐标;若不存在,请说明理由.
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【推荐3】如图,在平面直角坐标系中,矩形OABC的边OA在y轴的正半轴上,OC在x轴的正半轴上,OA=1,OC=2,点D在边OC上且OD=1.25.
![](https://img.xkw.com/dksih/QBM/2018/1/3/1852557173882880/1856154997145600/STEM/0a04d0f05ff84c1a9c054a90459e877a.png?resizew=176)
(1)求直线AC的解析式.
(2)在y轴上是否存在点P,直线PD与矩形对角线AC交于点M,使得△DMC为等腰三角形?若存在,直接写出所有符合条件的点P的坐标;若不存在,请说明理由.
(3)抛物线y=﹣x2经过怎样平移,才能使得平移后的抛物线过点D和点E(点E在y轴正半轴上),且△ODE沿DE折叠后点O落在边AB上O′处?
![](https://img.xkw.com/dksih/QBM/2018/1/3/1852557173882880/1856154997145600/STEM/0a04d0f05ff84c1a9c054a90459e877a.png?resizew=176)
(1)求直线AC的解析式.
(2)在y轴上是否存在点P,直线PD与矩形对角线AC交于点M,使得△DMC为等腰三角形?若存在,直接写出所有符合条件的点P的坐标;若不存在,请说明理由.
(3)抛物线y=﹣x2经过怎样平移,才能使得平移后的抛物线过点D和点E(点E在y轴正半轴上),且△ODE沿DE折叠后点O落在边AB上O′处?
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