如图,在平面直角坐标系中,抛物线
与
轴交于
,
两点,与
轴交于点
,已知
,
,连接
,点
是抛物线上的一个动点,点
是对称轴上的一个动点.
(1)求该抛物线的函数解析式.
(2)当
的面积为8时,求点
的坐标.
(3)若点
在直线
的下方,当点
到直线
的距离最大时,在抛物线上是否存在点
,使得以点
,
,
,
为顶点的四边形是平行四边形?若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.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/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da5abc4464f8c0424a6c896617321757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)求该抛物线的函数解析式.
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53502463cc76201000e02df314e58769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若点
![](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/dad2a36927223bd70f426ba06aea4b45.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/f28f2f53-5ec9-4030-9e60-3fed4b0a7732.png?resizew=168)
21-22九年级上·河南驻马店·期末 查看更多[5]
(已下线)河南省汝南县清华园学校2020—2021学年九年级上学期期末押题B卷数学试题广东省茂名市化州市2020-2021学年九年级下学期期中质量测评数学试题(中考模拟)(已下线)【万唯原创】2021年河南省面对面-专题练-专题15类型3+42021年广东省清远市英德市中考数学模拟试卷(二)2022年广东省(省考卷)中考数学模拟考试题
更新时间:2021-01-18 16:12:07
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【推荐1】二次函数
的图象交x轴于点A(-1,0),B(4,0),两点,交y轴于点C,动点M从点A出发,以每秒2个单位长度的速度沿AB方向运动,过点M作MN⊥x轴交直线BC于点N,交抛物线于点D,连接AC,设运动的时间为t秒.
![](https://img.xkw.com/dksih/QBM/2022/4/30/2976482181611520/3043632612196352/STEM/c94f201561504179be5d1fa083b34066.png?resizew=279)
(1)求二次函数
的表达式;
(2)连接BD,当
时,求△DNB的面积;
(3)在直线MN上存在一点P,当△PBC是以∠BPC为直角的等腰直角三角形时,求此时点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://img.xkw.com/dksih/QBM/2022/4/30/2976482181611520/3043632612196352/STEM/c94f201561504179be5d1fa083b34066.png?resizew=279)
(1)求二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
(2)连接BD,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209f628619c849207905b3d2bd3f07b2.png)
(3)在直线MN上存在一点P,当△PBC是以∠BPC为直角的等腰直角三角形时,求此时点P的坐标.
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【推荐2】如图1,已知二次函数
(a、b、c为常数,且
)的图象,与x轴交于A、B两点(A点在B点左侧),与y轴交于点
,且其函数表达式可以变形为
的形式.已知点P为该抛物线在第一象限内的一动点,设其横坐标为m.
(2)连接
,过点
作
轴于点
,交
于点
,直线
交
轴于点
,连接
.
①求出直线
的函数表达式(用含有
的代数式表示);
②设四边形
的面积为
,求
关于
的函数关系式,并求
的最大值;
(3)如图2,若直线
为该二次函数图象的对称轴,交
轴于点
,直线
,
分别交直线
于点
、
.在点
运动的过程中,
是否为定值?若是,请求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d89057bac47a9d19b74b34a5fffd9d9.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
①求出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②设四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62d0314d180fa3cc2dfee87a3c22adf7.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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)如图2,若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f000eef0716f7bf5c49d6d17b4467a.png)
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解题方法
【推荐3】如图,在平面直角坐标系中,△ABC的边BC在x轴上,顶点A在y轴的正半轴上,OA=2,OB=1,OC=4.
(1)求过A、B、C三点的抛物线的解析式;
(2)设点M是x轴上的动点,试问:在平面直角坐标系中,是否存在点N,使得以点A,B,M,N为顶点的四边形是菱形?若存在,直接写出点N的坐标;若不存在,说明理由;
(3)若抛物线对称轴交x轴于点P,在平面直角坐标系中,是否存在点Q,使△PAQ是以PA为腰的等腰直角三角形?若存在,写出所有符合条件的点Q的坐标,选择一种情况加以说明;若不存在,说明理由.
(1)求过A、B、C三点的抛物线的解析式;
(2)设点M是x轴上的动点,试问:在平面直角坐标系中,是否存在点N,使得以点A,B,M,N为顶点的四边形是菱形?若存在,直接写出点N的坐标;若不存在,说明理由;
(3)若抛物线对称轴交x轴于点P,在平面直角坐标系中,是否存在点Q,使△PAQ是以PA为腰的等腰直角三角形?若存在,写出所有符合条件的点Q的坐标,选择一种情况加以说明;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/2018/1/3/1852586819346432/1856227501391872/STEM/d4119c0ea7f6423dabae0c70604eefcd.png?resizew=190)
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【推荐1】已知一次函数
的图象与
轴、
轴分别交于
、
两点,点
为
轴负半轴上一点,且
.
(1)求直线
的函数表达式;
(2)点
是直线
上的一动点,在
轴上是否存在一点
,使以
、
、
、
为顶点的四边形是平行四边形?若存在,找出点
的坐标,若不存在,请说明理由;
(3)如图2,点
是直线
上的一动点,连接
,使得
将四边形
的面积分成
的两部分,请求出满足条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b3ba8cc918cbc35312705dd2647bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ca3edcfb7b49615fe1ad84dd9c9998b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/31/3ac17ed9-cc42-422a-a76a-0848d0ca31b8.png?resizew=484)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2ee84e16eca3f071314efd08053794.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2ee84e16eca3f071314efd08053794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4806fb7f95f63e863c287faa51f8e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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【推荐2】如图,
是
的直径,点D是
上一点,
于点C.
(1)如图①,连接
,若点C是
的中点,求
的大小;
(2)如图②,过点D作
的切线,交
的延长线于点E,
交
于点F,且
.若
的半径为2,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846bbe6e9646cae074a24c0dffc6d8f3.png)
(1)如图①,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7146ff83e64fb349ef8a409abac7073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e69a60fb95f19ae60c08e22f3fd5cd.png)
(2)如图②,过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f446ee928c27717fb1a3cc6c1ff802a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f919e16b9d69c0ef94a4979097fdda6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/0ca5516a-e45e-4fc1-96da-e89416466892.png?resizew=264)
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【推荐1】如图,抛物线
的顶点为
,对称轴是直线
,与
轴的交点为
和
.将抛物线
绕点
逆时针方向旋转
,点
为点
旋转后的对应点,旋转后的抛物线与
轴相交于
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/1d2623c5-daa4-4fbc-8fc6-a3271f9d9477.png?resizew=169)
(1)写出点
的坐标及求抛物线
的解析式;
(2)求证:
三点在同一直线上;
(3)设点
是旋转后抛物线上
之间的一动点.是否存在一点
,使四边形
的面积最大?如果存在,请求出四边形
的面积;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d8bf01092d97f3c2d199f25bda462b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d8bf01092d97f3c2d199f25bda462b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed81e79a297158ae4aa04a6b19aaafe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764c9a3e1df5884fb26e60662d1cda5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/1d2623c5-daa4-4fbc-8fc6-a3271f9d9477.png?resizew=169)
(1)写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d8bf01092d97f3c2d199f25bda462b.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2871818de07982986586d62da818079f.png)
(3)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e241afff5cd65c48202df35999710ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c732b2a3b0241d45cdc36d861fa1f57d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c732b2a3b0241d45cdc36d861fa1f57d.png)
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【推荐2】已知抛物线
的图象与x轴相交于点A和点
,与y轴交于点C,连接
,有一动点D在线段
上运动,过点D作x轴的垂线,交抛物线于点E,交x轴于点F,
,设点D的横坐标为m.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/e38e5532-a272-4ecc-861f-21b94c964ed4.png?resizew=307)
(1)求抛物线的解析式;
(2)连接
、
,当四边形
的面积最大时,求点D的坐标及最大面积;
(3)D点在运动过程中,是否存在三角形
为等腰三角形,若存在,直接写出m值,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/e38e5532-a272-4ecc-861f-21b94c964ed4.png?resizew=307)
(1)求抛物线的解析式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0664f9ba41b890825e0b564b92e05837.png)
(3)D点在运动过程中,是否存在三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
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【推荐1】综合与探究.
如图,抛物线y=x2+bx+c与x轴交于A、B两点,与y轴交于C点,OA=2,OC=6,连接AC和BC.
(1)求抛物线的解析式;
(2)点E是第四象限内抛物线上的动点,连接CE和BE.若设E点的横坐标为t,则请你求出△BCE面积S与t之间存在怎样的函数关系;
(3)若点M是x轴上的动点,在抛物线的对称轴上是否存在点N,使以点A、C、M、N为顶点的四边形是平行四边形?若存在,请直接写出点M的坐标;若不存在,请说明理由.
如图,抛物线y=x2+bx+c与x轴交于A、B两点,与y轴交于C点,OA=2,OC=6,连接AC和BC.
(1)求抛物线的解析式;
(2)点E是第四象限内抛物线上的动点,连接CE和BE.若设E点的横坐标为t,则请你求出△BCE面积S与t之间存在怎样的函数关系;
(3)若点M是x轴上的动点,在抛物线的对称轴上是否存在点N,使以点A、C、M、N为顶点的四边形是平行四边形?若存在,请直接写出点M的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/12/12/2612353741570048/2618365403086848/STEM/833c042f21184beba33b7be53abb5a5d.png?resizew=278)
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【推荐2】如图1,在平面直角坐标系中,已知A(-1,0)、C、(0,-2),以AC为一边向右上方作正方形ACDE,其中点D在第四象限,点E在第一象限,过点E作直线 l∥y轴.抛物线y=ax2+bx+c(a≠0)的对称轴为直线 l,且经过A、C两点,与x轴的另一交点为B.
![](https://img.xkw.com/dksih/QBM/2019/3/8/2156081192607744/2157559460085760/STEM/f0dac04bae7c46f88c1b2b1714446ec3.png?resizew=195)
(1)点E的坐标为 ________,该抛物的函数表达式为_______;
(2)设抛物线的顶点为M,连接MB.在抛物线上是否存在点N,使∠NBA=
∠MBA?若存在,请求出所有满足条件的点N的坐标:若不存在,请说明理由.
(3)过点D作直线m∥x轴,交直线l于点F,如图2.动点P从抛物线的顶点M出发,沿抛物线的对称轴l向上运动,与此同时,动点Q从点F出发,沿直线m向右运动,连接PQ、PB、BQ.设P、Q两点运动的速度均为1个单位长度/秒,运动的时间为t秒,△PBQ的面积为S.请直接写出S与t之间的函数关系式,并写出自变量t的取值范围.
![](https://img.xkw.com/dksih/QBM/2019/3/8/2156081192607744/2157559460085760/STEM/f0dac04bae7c46f88c1b2b1714446ec3.png?resizew=195)
![](https://img.xkw.com/dksih/QBM/2019/3/8/2156081192607744/2157559460085760/STEM/38b959556a75438ea396376194559091.png?resizew=209)
(1)点E的坐标为 ________,该抛物的函数表达式为_______;
(2)设抛物线的顶点为M,连接MB.在抛物线上是否存在点N,使∠NBA=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(3)过点D作直线m∥x轴,交直线l于点F,如图2.动点P从抛物线的顶点M出发,沿抛物线的对称轴l向上运动,与此同时,动点Q从点F出发,沿直线m向右运动,连接PQ、PB、BQ.设P、Q两点运动的速度均为1个单位长度/秒,运动的时间为t秒,△PBQ的面积为S.请直接写出S与t之间的函数关系式,并写出自变量t的取值范围.
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