如图1,在平面直角坐标系中,直线
与抛物线
交于
两点,其中
,
.该抛物线与
轴交于点
,与
轴交于另一点
.
![](https://img.xkw.com/dksih/QBM/2018/6/19/1970533681512448/1970839391920128/STEM/12bc5bf6c3454ffea379167c37a9b6f7.png?resizew=437)
(1)求
的值及该抛物线的解析式;
(2)如图2.若点
为线段
上的一动点(不与
重合).分别以
、
为斜边,在直线
的同侧作等腰直角△
和等腰直角△
,连接
,试确定△
面积最大时
点的坐标.
(3)如图3.连接
、
,在线段
上是否存在点
,使得以
为顶点的三角形与△
相似,若存在,请直接写出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d7a6fd6d651ae341154c2e40928d628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/906948588ab8a93adbacfd6606495fd0.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2018/6/19/1970533681512448/1970839391920128/STEM/12bc5bf6c3454ffea379167c37a9b6f7.png?resizew=437)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0877194ab8760f54c35527177b03ff93.png)
(2)如图2.若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80934ff67b4ceeaa13b00c029db565dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c802980d9d0cd03550a4a2972bd7ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785fad2b61dea00c4cb4a2889fa15641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bfd8e9f2f08a5807a23677988b240b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图3.连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d39f3605fd76630375bc8c0faf161cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
2018·山东德州·中考真题 查看更多[11]
山东省德州市2018年中考数学试题(已下线)2018年中考试题 专题3.3 二次函数(已下线)2018年中考试题分项版解析汇编【第一期】专题3.3 二次函数【校级联考】四川省资阳市安岳县2019届九年级中考一诊数学试卷2019年山东省日照市中考二模数学试题湖南省长沙市麓山国际实验学校 2018-2019学年初三下学期入学考试数学考试试卷 山东省泰安市泰山区2018-2019学年九年级上学期期末数学试题2019年四川省安岳县九年级第一次模拟数学试题2019年山东省临沂市平邑县中考模拟数学试题湖南省长沙市岳麓区麓山国际实验学校2020-2021学年九年级下学期入学数学试题山东省济宁市济宁学院附属中学2021-2022学年九年级上学期期中数学试题
更新时间:2018-06-19 21:45:55
|
【知识点】 面积问题(二次函数综合)
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,抛物线
与x轴交于A、B两点,与y轴交于点C,直线
的函数关系式为
,在x轴上取点
.
![](https://img.xkw.com/dksih/QBM/2022/6/1/2991964426862592/2995716888207360/STEM/0845be2bcb04493f9bb9abc1221e43c7.png?resizew=241)
(1)求抛物线的函数关系式;
(2)设抛物线上的一个动点P的横坐标为t.过点P作x轴的垂线与直线
相交于点E,与x轴交于点M.
①当点P位于第一象限内时,设四边形
的面积为S,求S与t之间的函数关系式,并求出S的最大值;
②当点P位于x轴上方时,是否存在点P,使得以P、M、B三点为顶点的三角形与
相似?若存在,请求出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812eed46a589bde8b7c78a81a8cf9b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ac8fa800c00933279f2b20e5034438.png)
![](https://img.xkw.com/dksih/QBM/2022/6/1/2991964426862592/2995716888207360/STEM/0845be2bcb04493f9bb9abc1221e43c7.png?resizew=241)
(1)求抛物线的函数关系式;
(2)设抛物线上的一个动点P的横坐标为t.过点P作x轴的垂线与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①当点P位于第一象限内时,设四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d8cad5b34e3269db5f683329111bc4.png)
②当点P位于x轴上方时,是否存在点P,使得以P、M、B三点为顶点的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】在平面直角坐标系
中,对称轴为直线
的抛物线
与
轴正半轴,
轴正半轴分别交于点
,
,且
.
![](https://img.xkw.com/dksih/QBM/2023/5/3/3229589772124160/3231056316563456/STEM/32873f2765bf41838098dc0e43b69a17.png?resizew=152)
(1)求抛物线的解析式;
(2)设抛物线
与
轴的另一个交点为
,点
在抛物线
上,直线
交
轴于点
,过点
作
轴交抛物线
于点
.
①若
的面积是
面积的
倍,求点
的坐标;
②连接
交直线
于点
,当点
在抛物线对称轴右侧图象上,且在直线
的上方时,记
,
,
的面积分别为
,
,
,若
,判断
是否存在最大值
若存在,求出最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96dde9c4aad0536c069127df0d4b12f.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
![](https://img.xkw.com/dksih/QBM/2023/5/3/3229589772124160/3231056316563456/STEM/32873f2765bf41838098dc0e43b69a17.png?resizew=152)
(1)求抛物线的解析式;
(2)设抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96dde9c4aad0536c069127df0d4b12f.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96dde9c4aad0536c069127df0d4b12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4d6eb67e32034c7c7312d6442e5ef40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96dde9c4aad0536c069127df0d4b12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d303a90093503c9dc6f12669cc9f842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d8c5b87693a15ee886b940f775e241d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698affd6a89113576ff5aa01f1b2cee5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
您最近一年使用:0次