如图1,抛物线
与x轴交于点 A ,与直线
交于点
,点
在y轴上.点 P 从点 B 出发,沿线段
方向匀速运动,运动到点O 时停止.
的表达式;
(2)在图1中过点 P 作
交抛物线于点D ,连接
,当四边形
是平行四边形时,求
的长.
(3)如图2,点P 从点B 开始运动时,点Q 从点O同时出发沿x轴正方向匀速运动,速度是点 P 速度的2倍,点 P 停止运动时点Q 也停止运动.连接
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2604d9c2f669617d83b5b8ee3ec87876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f579dffa5d64fb195b6dcdac3899a31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7641baffd700f0c577d001e9d7a6c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2604d9c2f669617d83b5b8ee3ec87876.png)
(2)在图1中过点 P 作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3224457d394d71df7d2955be6149dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef2c90c685a9635b4c0feb5644c2a97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/033274547930b2e2dcd4ea4919a36738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
(3)如图2,点P 从点B 开始运动时,点Q 从点O同时出发沿x轴正方向匀速运动,速度是点 P 速度的2倍,点 P 停止运动时点Q 也停止运动.连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d8d6156bcd7900599995d35fb464c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e28498741831c247740cbac2c8547ed.png)
更新时间:2024-05-27 11:23:29
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,已知抛物线
与
轴交于点
,
,与
轴交于点
.
(1)求此抛物线的解析式;
(2)设点
在此抛物线上,
交
轴于点
,连接
,
,请判断
的形状,并说明理由;
(3)设抛物线的对称轴交
轴于点
,在线段
上是否存在点
,使得
成为等腰直角三角形?若存在,求出点
的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.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/7291b3d921f595f28960abcdce6dfbed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec32b9cfee142d1d4f68ab4771de77c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/20/148bb1d2-36cb-49f7-97c8-fa95f6bac4c7.png?resizew=185)
(1)求此抛物线的解析式;
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c440eb5bb7f96165507dd82f04aa479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5fa7dd60b071d132afbfdaf170c1020.png)
(3)设抛物线的对称轴交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c3c30c66aa94afb935664dbe76501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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较难
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解题方法
【推荐2】已知抛物线y=ax2+bx+c(a≠0)与x轴交于A、B两点(点A在点B的左边),与y轴交于点C(0,﹣3),顶点
坐标为(1,﹣4).
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931332821065728/2938785760387072/STEM/9422d063-8306-4264-a1db-181c6b1c0572.png?resizew=451)
(1)求抛物线的解析式;
(2)如图1,抛物线在第四象限的图象上有一点M,求四边形ABMC面积的最大值及此时点M的坐标;
(3)如图2,直线CD交x轴于点E,若点P是线段EC上的一个动点,是否存在以点
、
、
为顶点的三角形与
相似.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931332821065728/2938785760387072/STEM/9422d063-8306-4264-a1db-181c6b1c0572.png?resizew=451)
(1)求抛物线的解析式;
(2)如图1,抛物线在第四象限的图象上有一点M,求四边形ABMC面积的最大值及此时点M的坐标;
(3)如图2,直线CD交x轴于点E,若点P是线段EC上的一个动点,是否存在以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
您最近一年使用:0次
【推荐1】已知点
是线段
上与点
不重合的一点,且
绕点
逆时针旋转角
得到
绕点
顺时针旋转角
得到
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e4e8f268817db6913f5534cc40f9bd.png)
![](https://img.xkw.com/dksih/QBM/2020/6/13/2483949625688064/2491458189656064/STEM/128833a3-85a3-4e66-b110-640bb3b47a30.png?resizew=662)
(1)如图1,当
时,求
的度数;
(2)如图2,当点
在
的延长线上时,求证:
;
(3)如图3,过
的中点
作
,过
的中点
作
,
与
交于点
,连接
,若
,求
的长度.
![](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/714311c53a64d6b850d84a2795db22cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7d000bcb717027a41c0b32d928f659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac0adca9a9b7c3d0be765a09c668a90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b6c03a586ca49ad576c3a2cb0f6d67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e4e8f268817db6913f5534cc40f9bd.png)
![](https://img.xkw.com/dksih/QBM/2020/6/13/2483949625688064/2491458189656064/STEM/128833a3-85a3-4e66-b110-640bb3b47a30.png?resizew=662)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f5423729ceac1cb71f4a2fdf4ac12b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fafdaaec1b5574cc3e8a362fb9bdac5.png)
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aba947934b05caae8b0c1fb1a522a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34446fff3e963b74ad036124dc67c60a.png)
(3)如图3,过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eaaa4a4552c2670494b445a82f7d3cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b6c03a586ca49ad576c3a2cb0f6d67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06569722a8033fac54185668ab47ae4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5851360a333a3fe51d12cd5e46115f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36ddd047c843a701021a741e6a3a391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea68142955809f9f40b15e3fa0f5bdd5.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】如图①,在
中,
,点
从点
出发,以每秒
个单位长度的速度沿
向终点
匀速运动,作
于
以
为边向右作正方形
设正方形
与
的重叠部分的面积为
点
的运动时间为
(秒).
![](https://img.xkw.com/dksih/QBM/2020/8/4/2520547641434112/2521084740952064/STEM/b15f3e4b-dcb0-4b09-8538-ca21ccbaf7fc.png)
(1)填空:
_ ,用含
的代数式表示
则
_ ;
(2)当点
落在边
上时,求
的值.
(3)当正方形
与
的重叠部分图形为四边形时,求
与
的函数关系式.
(4)如图②,点
出发的同时,点
从点
出发,以每秒
个单位长度的速度沿
向终点
匀速运动,作
于
以
为斜边向左构造等腰直角
,当
的直角顶点R落在正方形的边或对角线上时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1d49676784f113c91b0d72a778e124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59ab85c075a09d55d69e159e4abb268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e4ca8b58be33aa0b01f29308367f84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76cf95e0e8872eae99227eafde6293e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d7f34d2139e5fc6b47880a2360e9a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2020/8/4/2520547641434112/2521084740952064/STEM/b15f3e4b-dcb0-4b09-8538-ca21ccbaf7fc.png)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438b26957e0cace29ccb5c2c197a5e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)如图②,点
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb10f418620f7be1f8c7e94fb0b7a0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58e812c6efc3ecba8ce709dce8175f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2020/8/4/2520547641434112/2521084740952064/STEM/43584732-e950-4800-966b-8dd6bef05482.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】综合与实践
【问题发现】
在学习了“特殊的四边形”后,数学兴趣小组的同学发现了这样一个问题:
如图1,已知正方形
为对角线
上一动点,过点
作垂直于
的射线
,点
在射线
上,且
,连接
.
通过观察图形,数学兴趣小组的同学进行了如下猜想:
猜想①:
;
猜想②:
;
猜想③:点
在
上运动的过程中,四边形
的面积不变.
根据上述猜想,兴趣小组的同学进行了证明,过程如下:
四边形
是正方形,
,
,
,即
.
.
.
又
,
.
(依据:________).
……
(1)上述证明过程中的依据是________,上述猜想中正确的有________(填序号).
【类比探究】
(2)兴趣小组的同学在探究了正方形中的结论后,将正方形换成矩形继续探究.
如图
,已知矩形
,
,
为对角线
上一动点,过点
作垂直于
的射线
,点
在射线
上,且
,连接
.
①请判断线段
与
的数量关系,并说明理由.
②点
在
上运动时,四边形
的面积是否改变?________.(填“不变”或“改变”)
【拓展应用】
(3)在(2)的条件下,若
,点
在
上运动,当四边形
为轴对称图形时,请直接写出线段
的长.
【问题发现】
在学习了“特殊的四边形”后,数学兴趣小组的同学发现了这样一个问题:
如图1,已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d11e19c84255eb0431415c2dec553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f6218fe7c62cd2dd2b7c70b8f91a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
通过观察图形,数学兴趣小组的同学进行了如下猜想:
猜想①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
猜想②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
猜想③:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49404e6b19a342401a80d9feb1144605.png)
根据上述猜想,兴趣小组的同学进行了证明,过程如下:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1405bc4f389184d2c358a9a399940c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dec3857ac2b262e594e3ec33685c516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fef99a168f297bc9892e1da02ad89bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4156ccacaff769fa77244e3d614a898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b789a8e176dfc5b2dcc402b5efd9f2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3202a225bbcf6efabda3ffd6bd98e1e6.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4dc56b72f2d33c5dd350b922d27db10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb25a35a9674a5a353279f3f1db4b55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35146b5e2d8dafcb4767f389adb02973.png)
……
(1)上述证明过程中的依据是________,上述猜想中正确的有________(填序号).
【类比探究】
(2)兴趣小组的同学在探究了正方形中的结论后,将正方形换成矩形继续探究.
如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f6218fe7c62cd2dd2b7c70b8f91a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
①请判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef48918ed426d68d64591b866998a10.png)
【拓展应用】
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef48918ed426d68d64591b866998a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
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解答题-问答题
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较难
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名校
【推荐1】已知抛物线
与
轴只有一个公共点
且经过点
.
(1)求抛物线的函数解析式;
(2)直线
:
与抛物线
相交于B、C两点(B点在C点的左侧),与对称轴相交于点P,且B,C分布在对称轴的两侧.若B点到抛物线对称轴的距离为
,且
.
①试探求
与
的数量关系;
②求线段
的最大值,以及当
取得最大值时对应
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d59e31175628971b6436b47faded15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19be7df4dc8fcc4d85c5fc0301aff07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2f27ef317d1f86c8491e705cf73d3f2.png)
(1)求抛物线的函数解析式;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1532c4bd913df16648362a49f7096b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e451843b528b3e4b8cfc9fcce0a5cee0.png)
①试探求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知抛物线
(b,c为常数)的图象与x轴交于
,B两点(点A在点B左侧).与y轴相交于点C,顶点为D.
(1)当b=2时,求抛物线的顶点坐标;
(2)若点P是y轴上一点,连接BP,当PB=PC,OP=2时,求b的值;
(3)若抛物线与x轴另一个交点B的坐标为
,对称轴交x轴于点E,点Q是线段DE上一点,点N为线段AB上一点,且AN=2BN,连接NQ,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
(1)当b=2时,求抛物线的顶点坐标;
(2)若点P是y轴上一点,连接BP,当PB=PC,OP=2时,求b的值;
(3)若抛物线与x轴另一个交点B的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e32f16d75ccb62a04970f861827fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/accf852805b3e0cec6fce861f51291e5.png)
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【推荐1】如图,在平面直角坐标系中,矩形OABC的顶点A、C分别在x轴、y轴的正半轴上,且OA=4,OC=3,若抛物线经过O,A两点,且顶点在BC边上,点E的坐标分别为(0,1),对称轴交BE于点F.
(1)求该抛物线的表达式;
(2)点M在对称轴右侧的抛物线上,点N在x轴上,请问是否存在以点A,F,M,N为顶点的四边形是平行四边形?若存在,请求出所有符合条件的点M的坐标;若不存在,请说明理由.
(1)求该抛物线的表达式;
(2)点M在对称轴右侧的抛物线上,点N在x轴上,请问是否存在以点A,F,M,N为顶点的四边形是平行四边形?若存在,请求出所有符合条件的点M的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2019/1/11/2116370815336448/2117342348066816/STEM/0c7a44a165984462b167bf2627a29b83.png?resizew=119)
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【推荐2】如图,在平面直角坐标系
中,抛物线
与x轴交于A、B两点(点A在点B的左侧),与y轴交于点C,
,顶点为D,对称轴交x轴于点E.
(1)求抛物线的解析式、对称轴及顶点D的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/539cb79b-cfc5-409e-b918-38922b90f3af.png?resizew=216)
(2)在坐标平面内有一点N,若以A、B、C、N为顶点的四边形是平行四边形,求点N的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/210592cc-7a40-475e-8904-8f6692211cb5.png?resizew=216)
(3)在抛物线上有一点P,过点P作
轴交直线AC于点Q,若以O、C、P、Q为顶点的四边形是平行四边形,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/e52862d6-a403-444d-8bce-4b24ab8ec0bd.png?resizew=216)
(4)在对称轴上有一点Q,在抛物线上有一点P,若以A、B、P、Q为顶点的四边形是平行四边形,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/fdfe95e8-c486-47c9-83f0-f33cfa6402f3.png?resizew=216)
(5)在x轴上有一点Q,在抛物线上有一点P,若以A、C、P、Q为顶点的四边形是平行四边形,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/b6329a3b-e7f3-46ed-a9e4-eac8770392fa.png?resizew=216)
(6)在对称轴上有一点Q,在抛物线上有一点P,若以A、C、P、Q为顶点的四边形是平行四边形,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/ad30395d-a1f7-4629-8437-cc3fabe7d1f6.png?resizew=216)
(7)在对称轴上有一点N,在平面内存在点M,若以A、C、M、N为顶点的四边形是矩形,求点M的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/1cf9da66-8345-4021-8c29-647c8836c66e.png?resizew=216)
(8)在对称轴上有一点Q,在抛物线上有一点P,若以C、D、P、Q为顶点的四边形是菱形,求点Q的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/dad6e449-d66a-461e-964c-166b41a24453.png?resizew=216)
(9)在y轴上有一点M,在坐标平面内有一点N,若以A、C、M、N为顶点的四边形是正方形,求点N的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8afcd896c25f11b18ea574b37b60d6.png)
(1)求抛物线的解析式、对称轴及顶点D的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/539cb79b-cfc5-409e-b918-38922b90f3af.png?resizew=216)
(2)在坐标平面内有一点N,若以A、B、C、N为顶点的四边形是平行四边形,求点N的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/210592cc-7a40-475e-8904-8f6692211cb5.png?resizew=216)
(3)在抛物线上有一点P,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c64cadaba1ccc1e06c62b4d68fc542.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/e52862d6-a403-444d-8bce-4b24ab8ec0bd.png?resizew=216)
(4)在对称轴上有一点Q,在抛物线上有一点P,若以A、B、P、Q为顶点的四边形是平行四边形,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/fdfe95e8-c486-47c9-83f0-f33cfa6402f3.png?resizew=216)
(5)在x轴上有一点Q,在抛物线上有一点P,若以A、C、P、Q为顶点的四边形是平行四边形,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/b6329a3b-e7f3-46ed-a9e4-eac8770392fa.png?resizew=216)
(6)在对称轴上有一点Q,在抛物线上有一点P,若以A、C、P、Q为顶点的四边形是平行四边形,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/ad30395d-a1f7-4629-8437-cc3fabe7d1f6.png?resizew=216)
(7)在对称轴上有一点N,在平面内存在点M,若以A、C、M、N为顶点的四边形是矩形,求点M的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/1cf9da66-8345-4021-8c29-647c8836c66e.png?resizew=216)
(8)在对称轴上有一点Q,在抛物线上有一点P,若以C、D、P、Q为顶点的四边形是菱形,求点Q的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/dad6e449-d66a-461e-964c-166b41a24453.png?resizew=216)
(9)在y轴上有一点M,在坐标平面内有一点N,若以A、C、M、N为顶点的四边形是正方形,求点N的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/8fd340c0-db70-4c73-a307-f1b7b9d7e817.png?resizew=216)
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