如图①,在平面直角坐标系中,抛物线
(b、c为常数)与x轴交于A、B两点(点A在点B左侧),与y轴交于点
),抛物线的对称轴为直线
,过B、C两点作直线l,点P在抛物线上,且在直线l下方,连结
,交
于点Q.
(2)求点A和点B的坐标,并直接写出直线l的表达式;
(3)求
的最大值,及此时点P的坐标;
(4)如图②,点C关于x轴的对称点为点D,点R在线段
上,连接
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c79c84836922b96df5ae7ccd23288a7.png)
的最小值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c92187d7f16ee7d25d1be33c3e09b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd81cac5d2bcf0753819951088027d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求点A和点B的坐标,并直接写出直线l的表达式;
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309a2878b50bd2a02364f52bcfe5354e.png)
(4)如图②,点C关于x轴的对称点为点D,点R在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638f89746a35b59f1b492ef20ca85156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c79c84836922b96df5ae7ccd23288a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
更新时间:2024-05-21 09:38:39
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相似题推荐
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【推荐1】如图,抛物线
与x轴交于A,B两点(A在B的左侧),与y轴交于点
,点D与点C关于抛物线的对称轴对称.
(1)求抛物线的解析式及点D的坐标;
(2)点P是抛物线对称轴上的一动点,当
的周长最小时,求出点P的坐标;
(3)点Q在x轴上,且
,请直接写出点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947563a863483a683b4a6f812fc83ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676c1105b678d38cf01077c2f9b7b148.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/90d8cffd-825d-4388-8b9c-2cf42406ad39.jpg?resizew=148)
(1)求抛物线的解析式及点D的坐标;
(2)点P是抛物线对称轴上的一动点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
(3)点Q在x轴上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/834544048cebd8ed0fc33329d655f9d6.png)
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【推荐2】如图,直线
分别与
轴、
轴交于A、B两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/47f74bee-cdbc-4ab7-8f62-233d10c32291.jpg?resizew=324)
(1)A点的坐标______、B点的坐标______.
(2)已知点
坐标为
,设点
关于直线
的对称点为
,请直接写出点
的坐标;
(3)请在直线
上找一点
,使
的周长最短,求出点
的坐标.
(4)请在直线
和y轴上分别找一点M、N使
的周长最短,直接写出最短周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca621dc42304f844ac15dad7062d3959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/47f74bee-cdbc-4ab7-8f62-233d10c32291.jpg?resizew=324)
(1)A点的坐标______、B点的坐标______.
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ed24bfcc37b79fe9ca61ed8fdf26ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)请在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9dc427a01582ec222446b352d40ab0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(4)请在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
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【推荐1】如图
,在正方形
中,动点
,
同时从点
出发,以相同的速度分别沿
和
的路径向点
运动.设运动时间为
(单位:
),四边形
的面积为(单位:
),
与
之间的函数图象如图
所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/152dadb8-c1d5-41da-89c6-5d82145f532d.png?resizew=252)
(1)正方形的边长为______,点P的运动速度为______;
(2)求
与
之间的函数关系式;
(3)若
在
上运动时,点
,
的位置记为
,若
在
上运动时,点
,
的位置记为
,且点
从
运动到
的距离为
,求六边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7a366c0b70345e120cf991180ed483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87dfa6d5db3429e279f2e019d1575a3.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/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed8155a3f206117aa8754c68d4415be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.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/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/152dadb8-c1d5-41da-89c6-5d82145f532d.png?resizew=252)
(1)正方形的边长为______,点P的运动速度为______;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](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/45650ecabb2f4c8e7ea093ed4aea483d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](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/6d1b6138ccaab2371a32ed8ebf123425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cc163029790a6917e85c249952bcf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/215ba3c55b5b1a9f1da4886edffb0a24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce781fcab3b08eb3baafbca4a01bb8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b398bc53179dcca37dcb06fe869f407f.png)
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名校
【推荐2】在平面直角坐标系中,点
是坐标原点,点P(m,-1)
连接
,将线段
绕点
按逆时针方向旋转
得到线段
,且点
是抛物线
的顶点.
(1)若
,抛物线
经过点(2,2),当
时,求
的取值范围;
(2)已知点A(1,0),若抛物线
与
轴交于点
,直线
与抛物线
有且只有一个交点,请判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bcaceadc00d891e292c8bdff9e4ce64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.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/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e46371f310e03a153a1698aad9d4c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)已知点A(1,0),若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebeded5e0e2c715d59cbf80dd067d98.png)
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【推荐3】如图所示,在平面直角坐标系中,点A的坐标为(m,m),点B的坐标为(n,﹣n),抛物线经过A、O、B三点,连接OA、OB、AB,线段AB交y轴于点C.已知实数m、n(m<n)分别是方程x2﹣2x﹣3=0的两根.
(1)求直线AB和OB的解析式.
(2)求抛物线的解析式.
(3)若点P为线段OB上的一个动点(不与点O、B重合),直线PC与抛物线交于D、E两点(点D在y轴右侧),连接OD、BD.问△BOD的面积是否存在最大值?若存在,求出这个最大值并写出此时点D的坐标;若不存在说明理由.
(1)求直线AB和OB的解析式.
(2)求抛物线的解析式.
(3)若点P为线段OB上的一个动点(不与点O、B重合),直线PC与抛物线交于D、E两点(点D在y轴右侧),连接OD、BD.问△BOD的面积是否存在最大值?若存在,求出这个最大值并写出此时点D的坐标;若不存在说明理由.
![](https://img.xkw.com/dksih/QBM/2018/4/10/1920888405565440/1921109720760320/STEM/cb08e032eb274a9db40457f74656a14a.png?resizew=268)
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【推荐1】已知抛物线
的对称轴为直线
,交x轴于点A、B,交y轴于点C,点A的坐标为
.直线
与抛物线交于点E、F(点E在点F的右边),交y轴于点H.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/20/f3d2a947-1dc4-4c9e-b4f3-b86a7b26b289.png?resizew=649)
(1)求该抛物线的解析式;
(2)若
,且
的面积为21,求m的值;
(3)若
,直线AF交y轴于点K.当m的值为多少时,
的面积为最大,并求出
的面积最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b736d8cb466f0dad19f905000aba4da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719599df697f432d82ffa15989362645.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/20/f3d2a947-1dc4-4c9e-b4f3-b86a7b26b289.png?resizew=649)
(1)求该抛物线的解析式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19efe7dd307dd038ab46dc24761d3b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86afb5ee4c1db50a31353c7c093f7ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86afb5ee4c1db50a31353c7c093f7ba0.png)
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【推荐2】如图,抛物线
的顶点为
,与x轴交于A、B两点,且
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/244c2342-29a5-4501-b392-5d05f114b734.png?resizew=162)
(1)求抛物线的函数解析式;
(2)求
的面积;
(3)能否在抛物线第三象限的图象上找到一点P,使
的面积最大?若能,请求出点P的坐标;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dedf1ac64f26e27291390ea91c17628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0d82cb174d173b7e36937c3f99f591.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/244c2342-29a5-4501-b392-5d05f114b734.png?resizew=162)
(1)求抛物线的函数解析式;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)能否在抛物线第三象限的图象上找到一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
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【推荐3】已知四边形ABCD是边长为4的正方形,以AB为直径在正方形内作半圆,P是半圆上的动点(不与点A、B重合),连接PA、PB、PC、PD.
当PA的长度等于 时,△PAD是等腰三角形;
(2)如图②,以AB边所在直线为x轴、AD边所在直线为y轴,建立如图所示的直角坐标系(点A即为原点O),把△PAD、△PAB、△PBC的面积分别记为S1、S2、S3.设P点坐标为(a,b),试求2 S1S3-S22的最大值,并求出此时a,b的值.
当PA的长度等于 时,△PAD是等腰三角形;
(2)如图②,以AB边所在直线为x轴、AD边所在直线为y轴,建立如图所示的直角坐标系(点A即为原点O),把△PAD、△PAB、△PBC的面积分别记为S1、S2、S3.设P点坐标为(a,b),试求2 S1S3-S22的最大值,并求出此时a,b的值.
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【推荐1】如图1,在△ABC中,AB=BC=5,AC=6.△ECD是△ABC沿BC方向平移得到的,连接AE.AC和BE相交于点O.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/80a81470-3e5b-4130-88ec-1c16b3c72a42.png?resizew=473)
(1)判断四边形ABCE是怎样的四边形,说明理由;
(2)如图2,P是线段BC上一动点(图2),(不与点B、C重合),连接PO并延长交线段AE于点Q,QR⊥BD,垂足为点R.
①四边形PQED的面积是否随点P的运动而发生变化.若变化,请说明理由;若不变,求出四边形PQED的面积;
②当线段PB的长为何值时,△PQR与△BOC相似.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/80a81470-3e5b-4130-88ec-1c16b3c72a42.png?resizew=473)
(1)判断四边形ABCE是怎样的四边形,说明理由;
(2)如图2,P是线段BC上一动点(图2),(不与点B、C重合),连接PO并延长交线段AE于点Q,QR⊥BD,垂足为点R.
①四边形PQED的面积是否随点P的运动而发生变化.若变化,请说明理由;若不变,求出四边形PQED的面积;
②当线段PB的长为何值时,△PQR与△BOC相似.
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解答题-问答题
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【推荐2】如图,直线l1:y=﹣x+b与x轴、y轴分别交于A、B两点,直线l2:y=kx+1与x轴交于点D,两直线l1,l2相交于点C(2,2),在x轴上有一动点E(m,0).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/309ebd42-921d-44b1-9a17-5c07f6057f55.png?resizew=254)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/1f30c412-c0c6-4f9e-8371-a378e418c105.png?resizew=249)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/07816974-9177-4e29-b43b-38ea48f7a054.png?resizew=261)
(1)求两条直线的解析式;
(2)过点E作直线l⊥x轴,交直线l1于点F,交直线l2于点G;
①当GF的长为3时,求m的值;
②当
=3时,求m的值;
(3)当m=1时,如图③所示,连接BE,过点B作直线交x轴于点P,使得∠OBE=∠ABP,求直线BP的解析式.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/309ebd42-921d-44b1-9a17-5c07f6057f55.png?resizew=254)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/1f30c412-c0c6-4f9e-8371-a378e418c105.png?resizew=249)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/07816974-9177-4e29-b43b-38ea48f7a054.png?resizew=261)
(1)求两条直线的解析式;
(2)过点E作直线l⊥x轴,交直线l1于点F,交直线l2于点G;
①当GF的长为3时,求m的值;
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94efd3bae5cc4abcf207c29f1c79da7d.png)
(3)当m=1时,如图③所示,连接BE,过点B作直线交x轴于点P,使得∠OBE=∠ABP,求直线BP的解析式.
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