如图,在平面直角坐标系中,直线BC的解析式为
,直线BC交x轴和y轴分别于点B和点C,抛物线
交x轴于点A和点B,交y轴于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/1147fa40-0f4e-4682-b598-8805ca074d49.png?resizew=516)
(1)求抛物线的解析式;
(2)点P是第二象限抛物线上的点,连接PB、PC,设点P的横坐标为t,
的面积为S.求S与t的函数关系式(不要求写出t的取值范围);
(3)在(2)的条件下,点D在线段
上,连接PD、CD,
,点F在线段BC上,
,FE的延长线交x轴于点G,交PD于点E,连接CE,若
,
,
,求点P的横出标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca621dc42304f844ac15dad7062d3959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6a4f61e20afafd9a2fde4f6c406c8c4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/1147fa40-0f4e-4682-b598-8805ca074d49.png?resizew=516)
(1)求抛物线的解析式;
(2)点P是第二象限抛物线上的点,连接PB、PC,设点P的横坐标为t,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
(3)在(2)的条件下,点D在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a372f9723c974ffbd20c1947e6007be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0dc667b577e094dbe18354df8b5af9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8199e2fe9e85fa6641e7829a57bdfffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45bead63640aa84e238c9cec0436dd6.png)
2023·黑龙江哈尔滨·一模 查看更多[3]
更新时间:2023-04-15 19:19:43
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相似题推荐
解答题-问答题
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【推荐1】已知抛物线:
,且
.
(1)已知抛物线始终过定点,求定点的坐标;
(2)抛物线
不经过第三象限,且经过点
,若一元二次方程
的两根分别是
、
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073d42aa467c003cd7e1c51d8474048d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceb772b8acb22178c96f34d88415c658.png)
(1)已知抛物线始终过定点,求定点的坐标;
(2)抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073d42aa467c003cd7e1c51d8474048d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07d90f14dc4b24727310c63571ea760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028e1bad04698c7bb17388edefcf5fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9269ccdeb323ab0fcf13b7da4a6f15fb.png)
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【推荐2】如图,已知对称轴为直线
的抛物线
与x轴交于A、B两点,与y轴交于点C,其中
.
(1)求抛物线的表达式和顶点坐标;
(2)当一元二次方程
有两个负根时,求c的取值范围;
(3)当
时,函数的最大值与最小值的差是一个定值,直接写出m的取值范围:______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/6cf57085-b7a6-47ad-978d-a659fee39af5.png?resizew=182)
(1)求抛物线的表达式和顶点坐标;
(2)当一元二次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051ebc0e67c7182141ab5fb2f288b3d9.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7091c49074f62962862ba440a87802a.png)
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解答题-证明题
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解题方法
【推荐1】问题背景:如图1,在正方形
中,点
分别在边
上,
,求证:
.
洋洋同学给出了部分证明过程,请你接着完成剩余的证明过程.
到点
使
,连接
,
正方形
,
,
在
和
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e600ec2e3f05633c2e5161c4ceefaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41348e2653e0bb36a688478164b0d0cf.png)
迁移应用:如图2,在正方形
中,
交
于点
,若
,
,求
的长.
中,点
分别在边
上,
,若
,探究
与
的数量关系,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20cb2c77ea29b6eabbc477bc3743859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9af98a1a048b1e2f7c71e83c33498c.png)
洋洋同学给出了部分证明过程,请你接着完成剩余的证明过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23694d68d7bb59aa8c480f9c8a475b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](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/4f7c951662ce8875d493305b2bbf98ab.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3f2ff66bac38acbe538e735ae0ac9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f21650a25e37a07b5a54eacb1d94224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e600ec2e3f05633c2e5161c4ceefaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41348e2653e0bb36a688478164b0d0cf.png)
迁移应用:如图2,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b59ab01ffec649e05a023c073c4173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83fd42df335c85bf92b7961b9851977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a905adbbb180485b97a0f92534a1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb9a63909fa8f35f92645004ed584c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20cb2c77ea29b6eabbc477bc3743859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/664a4e2248bb8fbd025b8d7facb439bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
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【推荐2】正方形
的边长为2,点
是线段
上的一个动点,以
为边在
的右侧作正方形
,连接
.
为原点,若
长度为
,求点
的坐标;
(2)如图(2),探究
与
的数量、位置关系;
(3)连接
,直接写出
的最小值为__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/c10f93679abcee21bacd92c3b1552a0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55d57f1e556e58dbb075b2e968657044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)如图(2),探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a477603f3f88c3b48352b6130f9ad5.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3701616f3c7efb95c8b97dc937e9ea58.png)
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【推荐1】如图,在矩形
中,
,
,点E从点B出发,沿折线段
以每秒1个单位的速度向点D(不与D点重合)运动,与此同时,以
为直径且在
的右侧作半圆O.设点E的运动时间为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/a94457fd-43c9-47c9-a8c3-e90a63bbb149.png?resizew=167)
(1)发现:当点D开始落在半圆O上时,
_________;此时半圆O的半径为________;
(2)探究:当
秒时,
①连接
、
,判断
是否垂直
;
②求半圆O与矩形
重叠部分的面积;
(3)拓展:若半圆O与矩形
的边相切时,求点E到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9853c90ab11d8bf821168accaffb8c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b05a62d60783712740c622a47e46ede7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/a94457fd-43c9-47c9-a8c3-e90a63bbb149.png?resizew=167)
(1)发现:当点D开始落在半圆O上时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
(2)探究:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79a0699c36fa6f2de4d9a68d2e133f8.png)
①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
②求半圆O与矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)拓展:若半圆O与矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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【推荐2】我们定义:有一组对角为直角的四边形叫做“对直角四边形”.
(1)如图①,四边形ABCD为对直角四边形,∠B=90°,若AB2-AD2=4,求CD2-BC2的值;
(2)如图②,四边形ABCD中,∠ABC=90°,AB=BC,若BD平分∠ADC,求证:四边形ABCD为对直角四边形;
(3)在(2)的条件下,如图③,连结AC,若
,求tan∠ACD的值.
(1)如图①,四边形ABCD为对直角四边形,∠B=90°,若AB2-AD2=4,求CD2-BC2的值;
(2)如图②,四边形ABCD中,∠ABC=90°,AB=BC,若BD平分∠ADC,求证:四边形ABCD为对直角四边形;
(3)在(2)的条件下,如图③,连结AC,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be7de982733f6339266d9ebafaed5b71.png)
![](https://img.xkw.com/dksih/QBM/2019/5/16/2204829824794624/2207844110163968/STEM/fb86ea3b198e475bb8c2a7ab942d116c.png?resizew=445)
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解答题-问答题
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名校
【推荐1】如图,抛物线
与x轴交于点
,点
,且过点
,点P是抛物线
上的动点.
![](https://img.xkw.com/dksih/QBM/2022/1/15/2895174438690816/2973441013825536/STEM/b69bf41b-c7a7-4dff-b3d9-a95b558fb51f.png?resizew=142)
(1)求抛物线的解析式;
(2)当点P在直线
下方时,求
面积的最大值;
(3)若
与抛物线的对称轴相交于点E,求线段
的最小值.
![](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/ae07e50dbd1923ae541a0ad39ddd9fed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/2022/1/15/2895174438690816/2973441013825536/STEM/b69bf41b-c7a7-4dff-b3d9-a95b558fb51f.png?resizew=142)
(1)求抛物线的解析式;
(2)当点P在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf1c00108ec0fe5eefe9281ca2b1b6c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
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真题
【推荐2】如图,在直角坐标系中,点A的坐标为(﹣2,0),点B的坐标为(1,
),已知抛物线y=ax2+bx+c(a≠0)经过三点A、B、O(O为原点).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/ef0eed74-02af-44f5-9de7-12a68f3ad300.png?resizew=145)
(1)求抛物线的解析式;
(2)在该抛物线的对称轴上,是否存在点C,使△BOC的周长最小?若存在,求出点C的坐标;若不存在,请说明理由;
(3)如果点P是该抛物线上x轴上方的一个动点,那么△PAB是否有最大面积?若有,求出此时P点的坐标及△PAB的最大面积;若没有,请说明理由.(注意:本题中的结果均保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/567c3398a6af51d7efce62f2091f91f7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/ef0eed74-02af-44f5-9de7-12a68f3ad300.png?resizew=145)
(1)求抛物线的解析式;
(2)在该抛物线的对称轴上,是否存在点C,使△BOC的周长最小?若存在,求出点C的坐标;若不存在,请说明理由;
(3)如果点P是该抛物线上x轴上方的一个动点,那么△PAB是否有最大面积?若有,求出此时P点的坐标及△PAB的最大面积;若没有,请说明理由.(注意:本题中的结果均保留根号)
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【推荐3】如图1,已知抛物线
与x轴交于A、B两点,与y轴交于C点,且点A的坐标为
、点C的坐标为
.
![](https://img.xkw.com/dksih/QBM/2022/5/10/2976292591304704/2981487964348416/STEM/ec26fb8d-f840-4563-9c1b-087a5ee8c0ff.png?resizew=526)
(1)请写出该抛物线的函数表达式和点B的坐标;
(2)如图2,有两动点D、E在
的边上运动,运动速度均为每秒5个单位长度,它们分别从点C和点B同时出发,点D沿折线COB按C→O→B方向向终点B运动,点E沿线段BC按B→C方向向终点C运动,当其中一个点到达终点时,另一个点也随之停止运动.设运动时间为t秒,请解答下列问题:
①当t为何值时,
的面积等于
;
②在点D、E运动过程中,该抛物线上存在点F,使得依次连接AD、DF、FE、EA得到的四边形ADFE是平行四边形,请直接写出所有符合条件的点F的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df04abfcf792463c45866b9f32472c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0e705301752424a492f6277ed7774e.png)
![](https://img.xkw.com/dksih/QBM/2022/5/10/2976292591304704/2981487964348416/STEM/ec26fb8d-f840-4563-9c1b-087a5ee8c0ff.png?resizew=526)
(1)请写出该抛物线的函数表达式和点B的坐标;
(2)如图2,有两动点D、E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d630091e362f48d6dbc73811e07d41.png)
①当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a85a2c984df17f7ef91d014d931410d.png)
②在点D、E运动过程中,该抛物线上存在点F,使得依次连接AD、DF、FE、EA得到的四边形ADFE是平行四边形,请直接写出所有符合条件的点F的坐标.
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