如图,抛物线y=ax2+bx+c与坐标轴交于点A(0,﹣3)、B(﹣1,0)、E(3,0),点P为抛物线上动点,设点P的横坐标为t.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/1bd4d776-acd9-4641-8e2e-ea467a715f05.png?resizew=286)
(1)若点C与点A关于抛物线的对称轴对称,求C点的坐标及抛物线的解析式;
(2)若点P在第四象限,连接PA、PE及AE,当t为何值时,△PAE的面积最大?最大面积是多少?
(3)是否存在点P,使△PAE为以AE为直角边的直角三角形,若存在,直接写出点P的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/1bd4d776-acd9-4641-8e2e-ea467a715f05.png?resizew=286)
(1)若点C与点A关于抛物线的对称轴对称,求C点的坐标及抛物线的解析式;
(2)若点P在第四象限,连接PA、PE及AE,当t为何值时,△PAE的面积最大?最大面积是多少?
(3)是否存在点P,使△PAE为以AE为直角边的直角三角形,若存在,直接写出点P的坐标;若不存在,请说明理由.
2020·甘肃白银·二模 查看更多[11]
2020年甘肃省白银市九年级下学期第二次诊断数学试题(已下线)第05练:二次函数与实际问题-2022年【寒假分层作业】九年级数学(人教版)(全国通用)(已下线)专题02 二次函数与直角三角形问题-挑战2022年中考数学压轴题之学霸秘笈大揭秘2022年甘肃省酒泉市肃州区中考适应性检测(一)数学试题安徽省滁州市定远县城西六校2022-2023学年九年级下学期3月第一次检测数学试题2023年安徽省六安市金安区轻工中学中考数学二模试卷 河北省邯郸市凌云中学2022--2023学年九年级上学期期中数学试题(已下线)2023年安徽二模二次函数综合22023年甘肃省定西市临洮县中考模拟(一)数学模拟试题甘肃省平凉市崆峒区第七中学2023-2024学年九年级下学期第一次月考数学试题(已下线)热点04 二次函数(4大考向+重难通关练+培优争分练)-2024年中考数学【热点·重点·难点】专练(安徽专用)
更新时间:2022-03-01 13:30:21
|
【知识点】 特殊三角形问题(二次函数综合)
相似题推荐
解答题-问答题
|
较难
(0.4)
真题
【推荐1】如图,抛物线
过点
、点
,交y轴于点C.
(2)点
是抛物线上的动点
①当
取何值时,
的面积最大?并求出
面积的最大值;
②过点P作
轴,交
于点E,再过点P作
轴,交抛物线于点F,连接
,问:是否存在点P,使
为等腰直角三角形?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/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fe2c124d5bbbbe666ee145cd454b6b.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642538ab7d76e298016d23826542f540.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f409b28f7cb97726646e79709ad25190.png)
②过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae95e96ce568efee50145f8d017353df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20008ade7e23b01f5abdee57fa05a63d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
真题
【推荐2】如图,抛物线
与
轴相交于点
、
,与
轴相交于点
,抛物线的对称轴与
轴相交于点
.
是抛物线在
轴上方的一个动点(点
、
、
不在同一条直线上).分别过点
、
作直线
的垂线,垂足分别为
、
,连接点
、
.
![](https://img.xkw.com/dksih/QBM/2013/9/17/1573685528985600/1573685535408128/STEM/33349639742447d4af12b3deb586e54d.png?resizew=221)
(1)求点
,
的坐标(直接写出结果),并证明
是等腰三角形;
(2)
能否为等腰直角三角形?若能,求此时点
的坐标;若不能,说明理由;
(3)若将“
是抛物线在
轴上方的一个动点(点
、
、
不在同一条直线上)”改为“
是抛物线在
轴下方的一个动点”,其他条件不变,
能否为等腰直角三角形?若能,求此时点
的坐标(直接写出结果);若不能,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a34be54705c6af711cef1fa748635a8.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/63a253c7fdf589ee3dece13d5b5b5732.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/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://img.xkw.com/dksih/QBM/2013/9/17/1573685528985600/1573685535408128/STEM/33349639742447d4af12b3deb586e54d.png?resizew=221)
(1)求点
![](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/2fe69215d9f95d2b7e9fd8726e724db9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe69215d9f95d2b7e9fd8726e724db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若将“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe69215d9f95d2b7e9fd8726e724db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次