如图1,抛物线
与
轴交于点
、
,与
轴交于点
,点
是抛物线上的动点,连接
、
,
与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/2016/8/16/1574229652152320/1574229658755072/STEM/6573c368b99b46638e86837e700ecea3.png?resizew=337)
(1)求该抛物线所对应的函数解析式;
(2)若点
的坐标为
,请求出此时
的面积;
(3)过点
作
轴的平行线交
轴于点
,交直线
于点
,如图2.
①若
,求证:
;
②
能否为等腰三角形?若能,请求出此时点
的坐标;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526fe69179949493cce2f6332e223bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122cf7a2f27fadf126b282fb1b3e1533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e30645f36e8628b9e25d53598d5174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/723e5d013b530c3b52e1fc0b6f69e383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2016/8/16/1574229652152320/1574229658755072/STEM/6573c368b99b46638e86837e700ecea3.png?resizew=337)
(1)求该抛物线所对应的函数解析式;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/148d97803c3b16893ced41ad5cd9aba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e758896a742d3b378d5db952d59b233.png)
(3)过点
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228939fa4c664a277f42c2233eb3789c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be122bc88fdb7e058e32f3aebe3ab93f.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/017fd17fb8d628e52c611f8d074d939a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
2016·海南·中考真题 查看更多[2]
更新时间:2016-12-06 13:21:21
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相似题推荐
解答题-证明题
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【推荐1】如图1,在Rt△ABC中,∠ABC=90°,以线段BC为直径作⊙O交AC于点D,E为AB中点,连接ED,过点C作CF
AB交ED的延长线与点F.
![](https://img.xkw.com/dksih/QBM/2022/4/30/2969123490185216/2970958504919040/STEM/95a5443c-4bc5-430d-ba4f-b0180cff823f.png?resizew=335)
(1)求证:直线ED是⊙O的切线;
(2)判断△CDF的形状,并说明理由;
(3)如图2,连接OF交⊙O于点P,连接BP交AC于点Q,若BP
EF,AB=6,求PQ的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://img.xkw.com/dksih/QBM/2022/4/30/2969123490185216/2970958504919040/STEM/95a5443c-4bc5-430d-ba4f-b0180cff823f.png?resizew=335)
(1)求证:直线ED是⊙O的切线;
(2)判断△CDF的形状,并说明理由;
(3)如图2,连接OF交⊙O于点P,连接BP交AC于点Q,若BP
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
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【推荐2】综合与实践
综合与实践课上,老师让同学们以“矩形的折叠”为主题开展数学活动.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/69e5b102-ede1-4585-b407-fe8e9350209b.png?resizew=799)
(1)操作判断
操作一:对折矩形纸片
,使边
与边
重合,展开后得到折痕
;
操作二:分别在
,
上取点
,
,将四边形
沿EF折叠,点
,
的对应点分别落在点
,
处,连接
.
根据以上操作,结合图(
),判断下列结论不成立的是( )
A.
B.
C.
D.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca4bd71a27efd23361cbce7870a69e8.png)
(2)迁移探究
小航将矩形纸片换成边长为
的正方形纸片,并按照(
)中的方式操作,如图(
).
小航发现,此时(
)中的选项
,
的结论均成立,请你加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
的长度为__________.
(3)拓展探究
在(
)的探究中,若将
折叠,使点
的对应点
落在
上,折痕分别交
,
于点
,
,如图(
).当
是直角三角形时,直接写出
的长.
综合与实践课上,老师让同学们以“矩形的折叠”为主题开展数学活动.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/69e5b102-ede1-4585-b407-fe8e9350209b.png?resizew=799)
(1)操作判断
操作一:对折矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
操作二:分别在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bedde879f99aed69d745d5ec8fe62084.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
根据以上操作,结合图(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f22ebf55a7ba0c6eda1f5603375adf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cb411450ab81f89e54e56f59eaaac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e3b1b089fc22c77978df3176901cbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca4bd71a27efd23361cbce7870a69e8.png)
(2)迁移探究
小航将矩形纸片换成边长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
(3)拓展探究
在(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c018b37259f3ead2ab2d94bd744f44d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32878e731f2e515e4c8addad3757a3b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ebffbdca89cc68c33706ab069fc6fb.png)
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【推荐3】定义:如果一个等腰直角三角形的一个顶点为矩形的顶点,另两个顶点分别在矩形的边上,且任何两个顶点都不在矩形的同一边上,我们称这样的等腰直角三角形为矩形的“内接优三角形”.
如图,矩形ABCD中,点E、F分别在边CD、BC上,∠AEF=90°,AE=EF,△AEF为矩形ABCD的内接优三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/f2db74b0-2115-458d-863d-6832b094ecc4.png?resizew=140)
(1)正方形 (填“存在”或“不存在”)内接优三角形;
(2)已知△AEF为矩形ABCD的内接优三角形.
①若AD=4,AB=7,求AF的长;
②设AB=a,AD=b(a>b),问是否存在斜边长为
b的内接优三角形?若存在,请求出
的值;若不存在,请说明理由;
③若△CEF的外接圆与直线AB相切,求此时
的值.
如图,矩形ABCD中,点E、F分别在边CD、BC上,∠AEF=90°,AE=EF,△AEF为矩形ABCD的内接优三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/f2db74b0-2115-458d-863d-6832b094ecc4.png?resizew=140)
(1)正方形 (填“存在”或“不存在”)内接优三角形;
(2)已知△AEF为矩形ABCD的内接优三角形.
①若AD=4,AB=7,求AF的长;
②设AB=a,AD=b(a>b),问是否存在斜边长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2122e3f1e76a635e58e4d54aa594c552.png)
③若△CEF的外接圆与直线AB相切,求此时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2122e3f1e76a635e58e4d54aa594c552.png)
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【推荐1】如图,二次函数y=a(x2+2mx﹣3m2)(其中a,m是常数a<0,m>0)的图象与x轴分别交于A、B(点A位于点B的右侧),与y轴交于点C(0,3),点D在二次函数的图象上,CD∥AB,连结AD.过点A作射线AE交二次函数的图象于点E,AB平分∠DAE.
(1)求a与m的关系式;
(2)求证:
为定值;
(3)设该二次函数的图象的顶点为F.探索:在x轴的正半轴上是否存在点G,连结GF,以线段GF、AD、AE的长度为三边长的三角形是直角三角形?如果存在,只要找出一个满足要求的点G即可,并用含m的代数式表示该点的横坐标;如果不存在,请说明理由.
(1)求a与m的关系式;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e003ad7604dc766aabcf1f9ec02a3bc.png)
(3)设该二次函数的图象的顶点为F.探索:在x轴的正半轴上是否存在点G,连结GF,以线段GF、AD、AE的长度为三边长的三角形是直角三角形?如果存在,只要找出一个满足要求的点G即可,并用含m的代数式表示该点的横坐标;如果不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/45c34086-a779-4700-878d-9f3ec8476028.png?resizew=149)
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解题方法
【推荐2】定义:在平面直角坐标系中,
为坐标原点,点
的坐标为
,点
的坐标为
,且
,
,若
为某个等腰三角形的腰,且该等腰三角形的底边与
轴垂直,则称该等腰三角形为点
,
的“伴随等腰三角形”.
(1)若
,
为抛物线
上的点,它的“伴随等腰三角形”记为
,且底边
,点
,
均在点
的右侧,设点
的横坐标为
.
①若点
在这条抛物线上,则
的面积是_______.
②设
,
两点的纵坐标分别为
,
,比较
与
的大小;
③当
底边上的高等于底边长的
倍时,求点
的坐标;
(2)若
,
是抛物线
上的两点,它的“伴随等腰三角形
”以
为底,且点
,
均在点
的同侧(左侧或右侧),点
的横坐标是点
的横坐标的
倍,过点
,
分别作垂直于
轴的直线
,
.设点
的横坐标为
,该抛物线在直线
,
之间的部分(包括端点)的最高点的纵坐标为
,直接写出
与
之间的函数关系式,并写出自变量
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56720e2f2b0ddd72156da495923698da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2852ae85cfcc804b3192ea8543c88938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6f3a6c1002546a7568c91ad97e47d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3236d825b994ee9c28e5d5479a57b8ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1fa5d37fc136489cb494310fc2825f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b7fd6544631e6559a8490c56189f2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1fa5d37fc136489cb494310fc2825f.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1fa5d37fc136489cb494310fc2825f.png)
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aadf9ab510510120699c5eee39ab18b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f9185c7d48b015d9cd0525616b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f9185c7d48b015d9cd0525616b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】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,对称轴交BE于点F,点D、E的坐标分别为(3,0),(0,1).
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761226006528/1773761226457088/STEM/d9c0fa88b5ff449096776460d3531bce.png?resizew=196)
(1)求抛物线的解析式;
(2)猜想△EDB的形状并加以证明;
(3)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/2017/8/1/1773761226006528/1773761226457088/STEM/d9c0fa88b5ff449096776460d3531bce.png?resizew=196)
(1)求抛物线的解析式;
(2)猜想△EDB的形状并加以证明;
(3)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.
您最近一年使用:0次