如图,抛物线
交
轴于点
,交
轴于点
,已知经过点
的直线的表达式为
.
(1)求抛物线的函数表达式及其顶点
的坐标;
(2)如图①,点
是线段
上的一个动点,其中
,作直线
轴,交直线
于
,交抛物线于
,作
轴,交直线
于点
,四边形
为矩形.设矩形
的周长为
,写出
与
的函数关系式,并求
为何值时周长
最大;
(3)如图②,在抛物线的对称轴上是否存在点
,使点
构成的三角形是以
为腰的等腰三角形.若存在,直接写出所有符合条件的点
的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2014/9/26/1573750580740096/1573750586195968/STEM/49d8b3b9ba3e4dc0b7b721057fb6b5a7.png?resizew=211)
![](https://img.xkw.com/dksih/QBM/2014/9/26/1573750580740096/1573750586195968/STEM/1018fee9738b4d7c8f732c496fcc7236.png?resizew=204)
图① 图②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.png)
(1)求抛物线的函数表达式及其顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)如图①,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ed121fc90f45c9259a7eb1113c555d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deaf0e32fd982f49886eb7faaa25b48e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea1cdf62cac33194e615d5640f70f7d.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d306d136acca4e114e0e8993edbc98ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
(3)如图②,在抛物线的对称轴上是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b96d93615b03284ada76153c394a49d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/2014/9/26/1573750580740096/1573750586195968/STEM/49d8b3b9ba3e4dc0b7b721057fb6b5a7.png?resizew=211)
![](https://img.xkw.com/dksih/QBM/2014/9/26/1573750580740096/1573750586195968/STEM/1018fee9738b4d7c8f732c496fcc7236.png?resizew=204)
图① 图②
2014·辽宁阜新·中考真题 查看更多[5]
2014年初中毕业升学考试(辽宁阜新卷)数学2015届湖北省黄冈市团陂中学中考模拟数学试卷青岛版九年级数学下册期末综合检测试卷3(已下线)【万唯原创】2019年河南省中考数学逆袭卷 特训21-22江苏省苏州市姑苏区振华中学校2021-2022学年九年级上学期10月月考数学试题
更新时间:2016-12-05 21:06:40
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相似题推荐
【推荐1】已知:矩形ABCD中,AB=9,AD=6,点E在对角线AC上,且满足AE=2EC,点F在线段CD上,作直线FE,交线段AB于点M,交直线BC于点N.
(1)当CF=2时,求线段BN的长;
(2)若设CF=x,△BNE的面积为y,求y关于x的函数解析式,并写出自变量的取值范围;
(3)试判断△BME能不能成为等腰三角形,若能,请直接写出x的值.
(1)当CF=2时,求线段BN的长;
(2)若设CF=x,△BNE的面积为y,求y关于x的函数解析式,并写出自变量的取值范围;
(3)试判断△BME能不能成为等腰三角形,若能,请直接写出x的值.
![](https://img.xkw.com/dksih/QBM/2021/11/14/2850863730114560/2851823178612736/STEM/4083fff2-3858-4d4d-9aec-74147cef3d1c.png)
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【推荐2】综合探究
如图1,平面直角坐标系
中,
,反比例函数
的图象分别交矩形
的两边
、
于
、
(
、
不与A重合),沿着
将矩形
折叠使A、
重合.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/63d09bd5-2526-4358-829e-a4369cfa72ef.png?resizew=488)
(1)当点
为
中点时,求点
的坐标,并直接写出
与对角线
的关系;
(2)如图2,连接
.
①
与
是否相似?请说明理由;
②
的周长是否有最小值,若有,请求出最小值;若没有,请说明理由.
③当
平分
时,直接写出
的值.
如图1,平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e86bf730e2ab6b54a41f7dd78775fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f787a90a3e8605c711763924ac98c23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ca6d348c4c0f53eb995246e1cb5ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/63d09bd5-2526-4358-829e-a4369cfa72ef.png?resizew=488)
(1)当点
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2698f08d94afa1cd5b81444791f4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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【推荐1】如图,在平面直角坐标系
中,矩形
的边
在
轴上,顶点
在抛物线
上,且抛物线交
轴于另一点
.
![](https://img.xkw.com/dksih/QBM/2016/3/2/1573979886714880/1573979893153792/STEM/10546abc590d47d8888399471edad3d1.png)
(1)则
= ,
= ;
(2)已知
为
边上一个动点(不与
、
重合),连结
交
于点
,过点
作
轴的平行线分别交抛物线、直线
于
、
.
①求线段
的最大值,此时
的面积为;
②若以点
为圆心,
为半径作⊙O,试判断直线
与⊙O的能否相切,若能请求出
点坐标,若不能请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
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(1)则
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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①求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://img.xkw.com/dksih/QBM/2016/3/2/1573979886714880/1573979893153792/STEM/a6addc8a50344ca68c333ef0c7ea75c1.png)
②若以点
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【推荐2】如图,关于x的二次函数
的图象记为L,点P是L上对称轴右侧的一点,作
轴,与L在对称轴左侧交于点Q;点A,B的坐标分别为
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/65775a4c-95ce-47ba-a0de-07a27d4679f2.png?resizew=191)
(1)若二次函数的图象经过
,①求出此时t的值;②求二次函数图象的对称轴,及顶点坐标;
(2)设点P,Q的横坐标分别为m,n,则n关于m的关系式为__________;
(3)若L与线段
有公共点,则t的取值范围为__________.
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(1)若二次函数的图象经过
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(2)设点P,Q的横坐标分别为m,n,则n关于m的关系式为__________;
(3)若L与线段
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