综合与探究
如图,二次函数
的图象与x轴交于A,B两点(点A在点B的左侧),与y轴交于点C,对称轴与x轴交于点D,连接
,作直线
.
的表达式;
(2)如图1,若点P是第四象限内二次函数图象上的一个动点,其横坐标为m,过点P分别作x轴、y轴的垂线,交直线
于点M,N,试探究线段
长的最大值;
(3)如图2,若点Q是二次函数图象上的一个动点,直线
与y轴交于点H,连接
,在点Q运动的过程中,是否存在点H,使以H,C,B为顶点的三角形与
相似?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
如图,二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffc185742fc90c1a52d5c69bbec8f176.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图1,若点P是第四象限内二次函数图象上的一个动点,其横坐标为m,过点P分别作x轴、y轴的垂线,交直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)如图2,若点Q是二次函数图象上的一个动点,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
2024·山西阳泉·一模 查看更多[3]
2024年山西省阳泉市多校中考一模数学试题2024年山西省大同市平城区两校联考中考二模数学试题(已下线)抢分秘籍13 二次函数中求线段,线段和,面积等最值问题-备战2024年中考数学抢分秘籍(全国通用)
更新时间:2024-04-08 14:48:22
|
相似题推荐
解答题-问答题
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名校
【推荐1】已知:如图,抛物线
与y轴交于点
,与x轴交于点A、B,点A的坐标为
.
(1)求该抛物线的解析式;
(2)点Q是线段
上的动点,过点Q作
,交
于点E,连接
.求
;
(3)在(2)的条件下,设点Q的横坐标为m,
的面积为S,求S关于m的函数关系式;当
的面积最大时,求点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bac419e547ef6b3f34aae7ae59c5c4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5907cec6649703d5e158bf44b3c4dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf65c63b509b452e93f0de4fd768259.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/dda57556-1ed3-49d8-b716-80ceda689774.png?resizew=196)
(1)求该抛物线的解析式;
(2)点Q是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/477299ffa5ca3e4664b2cbae878f5f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de029f895ef336cec312087d4aa1321.png)
(3)在(2)的条件下,设点Q的横坐标为m,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86643348a8164750d9aefcfe20fecb7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86643348a8164750d9aefcfe20fecb7c.png)
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【推荐2】如图
,在
中,
,
(
),
是线段
上的动点(不与点
,
重合),将线段
绕点
顺时针旋转
得到线段
,连接
,
.过点
作
交
的延长线于点
.
,求
的大小(用含
的代数式表示);
(2)求证:
;
(3)如图
,当
,
,
三点共线时,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83e7c8586eef5596aef5fb5160a196a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5a4f395ee2aeee0987434af24298bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a14018ab239f5bc0b7553a86c89863b.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc0bb8abb46f9f1fc447074577bb749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc879881512aa68dccd3a320e8a1e9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46c2f854a5b3b896b883636ae3cfc7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b40b8bb8979f0f7ab54a5da576bc79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561c63e487bf39bf9b3eb3479ed8c118.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289e7dbf05a4eaa337068f84203fec5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49f48ca55ddb8705f953d0279fa5420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
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【推荐1】已知:抛物线
经过
,
,
三点.
![](https://img.xkw.com/dksih/QBM/2022/4/28/2967901190619136/2977689648373760/STEM/dfbf42d8d255454985582f1401b74d8f.png?resizew=527)
(1)求抛物线的解析式;
(2)如图
,点
为直线
上方抛物线上任意一点,连
、
、
,
交直线
于点
,设
,求当
取最大值时点
的坐标,并求此时
的值.
(3)如图
,点
为抛物线对称轴与
轴的交点,点
关于
轴的对称点为点
.
①直接写出
的周长______;
②直接写出
的值______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://img.xkw.com/dksih/QBM/2022/4/28/2967901190619136/2977689648373760/STEM/dfbf42d8d255454985582f1401b74d8f.png?resizew=527)
(1)求抛物线的解析式;
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.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/8d86e8928530a34ff3721b998ad5e058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
①直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab142c659d5434d88d7f6f5d994cfd18.png)
②直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f95865a1d7733fa69387d316100d4a7.png)
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【推荐2】问题提出:
(1)我国古代数学家赵爽巧妙地用“弦图”证明了勾股定理,标志着中国古代的数学成就.小林用边长为10的正方形
制作了一个“弦图”:如图①,在正方形
内取一点E,使得
,作
,
,垂足分别为F、G,延长
交
于点H.若
,求
;
问题解决:
(2)如图②,四边形
是公园中一块空地,
米,
,
,
,空地中有一段半径为50米的弧形道路(即
),现准备在
上找一点P,将弧形道路改造为三条直路(即
),并要求
,三条直路将空地分割为
、
和四边形
三个区域,用来种植不同的花草.
①求
的度数;
②求四边形
的面积.
(1)我国古代数学家赵爽巧妙地用“弦图”证明了勾股定理,标志着中国古代的数学成就.小林用边长为10的正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f46f19939f38833f9152942f8241b7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1893d78af450a5fa09810537adc2dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37a450636672d5a6b202d42aa3a1f51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8431e94821612587f5bda0e4b7b4e4a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c49e2601b13579e9630c63e2bec2215.png)
问题解决:
(2)如图②,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bc8261605ac71fbec7a9558e5a9791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4d00b86b2f067b902baf6e52f0faab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c7267e5313b9b00ef22c94a479fc34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9b0d3cf342e065b4c8e21443bfbfbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2bdc60a42a1addaf772c18972e576fa.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
②求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2bdc60a42a1addaf772c18972e576fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/d25f6cf5-71b7-46ee-8366-e6a6d4973a0b.png?resizew=370)
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真题
名校
【推荐1】如图,在平面直角坐标系中,抛物线
与
轴交于点
,
,与
轴交于点
,其中
,
.
(1)求该抛物线的表达式;
(2)点
是直线
下方抛物线上一动点,过点
作
于点
,求
的最大值及此时点
的坐标;
(3)在(2)的条件下,将该抛物线向右平移
个单位,点
为点
的对应点,平移后的抛物线与
轴交于点
,
为平移后的抛物线的对称轴上任意一点.写出所有使得以
为腰的
是等腰三角形的点
的坐标,并把求其中一个点
的坐标的过程写出来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d8bf01092d97f3c2d199f25bda462b.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/7f9e8449aad35c5d840a3395ea86df6d.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/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae140e4db2c5563e5f902fcbebaac262.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/e9eeb15e-1573-42eb-b732-76e733e3ffef.png?resizew=310)
(1)求该抛物线的表达式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2951b9f77413d5f062acb300b09de1f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在(2)的条件下,将该抛物线向右平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8db072e2b6104671b82f948012fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307569acb68c533e026a1f09c6328833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐2】如图,抛物线
与
轴交于
、
两点,与
轴交于点
,抛物线的对称轴为直线
,交抛物线于点
,交
轴于点
.
(1)求抛物线的函数表达式及点
、点
的坐标;
(2)抛物线对称轴上的一动点
从点
出发,以每秒1个单位的速度向上运动,连接
,
,设运动时间为
秒(
),在点
的运动过程中,请求出:当
为何值时,
?
(3)若点
在抛物线上
、
两点之间运动(点
不与点
、
重合),在运动过程中,设点
的横坐标为
,
的面积为
,求
关于
的函数关系式,并求
为何值时
有最大值,最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/340a9ca51c8dac94263a72a2bd0ae292.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/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c708dbe20f9aa5d0e17ccb96ebca8e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/0f1f0701-a851-4463-859b-c5f27890520c.png?resizew=268)
(1)求抛物线的函数表达式及点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)抛物线对称轴上的一动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1633e622ce9e9752a0aad6cf75cd9cb.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/acc290b44635265137fdf13146b6a6d9.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe51b50eca45db5d8ca5f4949c56d137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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【推荐1】如图,直线
与y轴交于A,与x轴交于B,抛物线
与直线交于A,E两点,与x轴交于C,D两点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/8c335404-5f22-4eb6-85e6-036573c263a6.png?resizew=213)
(1)求抛物线的解析式;
(2)点P为线段
上一点,作
轴交于
于Q,当
时,求点P的坐标;
(3)作
交x轴于F,点G是第四象限内抛物线上一点,若以C,D,G为顶点的三角形与
相似,求出点G的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373e940578737a54a51be72e53a31c36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fd45bbc9a577f45b2b1e66ead7b57f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a2d1f912f7c72cc91385b753c772f4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/8c335404-5f22-4eb6-85e6-036573c263a6.png?resizew=213)
(1)求抛物线的解析式;
(2)点P为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2000feb43aa9dd3e5af3ac875f6a36.png)
(3)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fe2cc764de5fa58e9d90d750c5c528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
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【推荐2】抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877ccf703523f3b0ed6c94b2873c8d4f.png)
交
轴于
,
两点(
在
的左边),
是抛物线的顶点.
(1)当
时,直接写出
,
两点的坐标:
(2)点
是对称轴右侧抛物线上一点,
,
①如图(1),求线段
长度;
②如图(2),当
,
,
为线段
上一点.若
与
相似,并且符合条件的点
有
个,求
和
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877ccf703523f3b0ed6c94b2873c8d4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344cc24b575f4fd1ea7fe8ce5612fa9a.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/7f9e8449aad35c5d840a3395ea86df6d.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://img.xkw.com/dksih/QBM/editorImg/2023/6/8/d5a1c18b-a160-4991-8d0a-07c730eeab94.png?resizew=347)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82a2554001c0544befbf0a20bc9abbb.png)
①如图(1),求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
②如图(2),当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edda6261f4b7eed205250df231cbe9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e15d188f2c16bd519fba975c4a86db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28c9f4021dc08ed386d9a0a6be8d3870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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(0.4)
真题
【推荐3】已知直线y=kx+3(k<0)分别交x轴、y轴于A、B两点,线段OA上有一动点P由原点O向点A运动,速度为每秒1个单位长度,过点P作x轴的垂线交直线AB于点C,设运动时间为t秒.
(1)当k=﹣1时,线段OA上另有一动点Q由点A向点O运动,它与点P以相同速度同时出发,当点P到达点A时两点同时停止运动(如图1).
①直接写出t=1秒时C、Q两点的坐标;
②若以Q、C、A为顶点的三角形与△AOB相似,求t的值.
(2)当
时,设以C为顶点的抛物线y=(x+m)2+n与直线AB的另一交点为D(如图2),
①求CD的长;
②设△COD的OC边上的高为h,当t为何值时,h的值最大?
(1)当k=﹣1时,线段OA上另有一动点Q由点A向点O运动,它与点P以相同速度同时出发,当点P到达点A时两点同时停止运动(如图1).
①直接写出t=1秒时C、Q两点的坐标;
②若以Q、C、A为顶点的三角形与△AOB相似,求t的值.
(2)当
![](https://img.xkw.com/dksih/QBM/2011/7/26/1573228124979200/1573228220735488/STEM/151ac1e87d924a18af387b073027083c.png)
①求CD的长;
②设△COD的OC边上的高为h,当t为何值时,h的值最大?
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/26/bab354ec-ae42-4d14-928e-522c597d9112.png?resizew=380)
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