如图,顶点坐标为
的抛物线
与
轴交于
两点(点
在点
的左边),与
轴交于点
是直线
上方抛物线上的一个动点,连接
交拋物线的对称轴于点
.
(2)连接
,当
的周长最小时,求点
的坐标;
(3)过点
作
轴于点
,交直线
于点
,连接
.在点
运动过程中,是否存在使
为等腰三角形?若存在,求点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f45ba602e142644c6ad9f802b9ce4afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.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/868b820a3166ce37b762fc3ecac3c45c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967e7d3f5d610bbb4a9859bd15fa382d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fb6e81fee5674c3e26a65e58cc506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
更新时间:2024-04-18 16:21:49
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相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】图为抛物线
的一部分,它经过A
,B
两点.
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570608941858816/1570609073840128/STEM/0d5704b0-2993-41ab-8e22-a6d49d276f0b.png)
(1)求抛物线的解析式;
(2)将此抛物线向左平移3个单位,再向下平移1个单位,求平移后的抛物线的解析式.
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570608941858816/1570609073840128/STEM/f48e3bb9e80b453091dc699d5cfd879f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed18bd80c6c4142f68e89f4ad44570b5.png)
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570608941858816/1570609073840128/STEM/0d5704b0-2993-41ab-8e22-a6d49d276f0b.png)
(1)求抛物线的解析式;
(2)将此抛物线向左平移3个单位,再向下平移1个单位,求平移后的抛物线的解析式.
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解答题-计算题
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适中
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【推荐2】如图,抛物线
与直线
相交于点
和
,且抛物线经过点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/089da1a9-7063-4543-9964-cc01dc07151b.png?resizew=174)
(1)求抛物线的解析式;
(2)若
,则
的取值范围是__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/204696a289b1f47a176eb16c1cecf8b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe47e01d46d427917ef49b8b4547790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623afc24f2227004b0e1b3922dfb954b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed18bd80c6c4142f68e89f4ad44570b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/089da1a9-7063-4543-9964-cc01dc07151b.png?resizew=174)
(1)求抛物线的解析式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4834e398efbbde5985fcce2ce93c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】如图1,在平面直角坐标系中,抛物线
经过A(1,0),C(0,5)两点,与x轴的另一交点为B.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/0f24bf20-acc5-4b8e-8687-b16b1fb6e5ae.png?resizew=318)
(1)求抛物线解析式;
(2)若点M为直线BC下方抛物线上一动点,MN⊥x轴交BC于点N;
①当线段MN的长度最大时,求此时点M的坐标及线段MN的长度;
②如图2,连接BM,当△BMN是等腰三角形时,求此时点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/0f24bf20-acc5-4b8e-8687-b16b1fb6e5ae.png?resizew=318)
(1)求抛物线解析式;
(2)若点M为直线BC下方抛物线上一动点,MN⊥x轴交BC于点N;
①当线段MN的长度最大时,求此时点M的坐标及线段MN的长度;
②如图2,连接BM,当△BMN是等腰三角形时,求此时点M的坐标.
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解答题-问答题
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适中
(0.65)
【推荐2】有一组邻边相等的凸四边形叫做“乐学四边形”,如菱形,正方形等都是“乐学四边形”,这一组相等的邻边叫做“善思线段”.抛物线
与x轴交于A、B两点(点A在点B的左侧),与y轴交于点C,抛物线的顶点为点 D.
,请判断四边形
是否为“乐学四边形”,如果是,请说明理由并指出“善思线段”,如果不是,请说明理由.
(2)在第(1)问的条件下,试探究在第一象限内,抛物线上是否存在一点E使得
,若存在,请求出点E的横坐标,若不存在,请说明理由.
(3)四边形
为“乐学四边形”,且
.抛物线还满足:
①
;
②
为等腰直角三角形;
点
是抛物线
上任意一点,且
.若
恒成立,求m的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdc829ee5eb97cd5d926b246468b15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bcae9ff64b62b72a7330f48c314451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fdb48aaf0f4a2451390d27fb5f510a.png)
(2)在第(1)问的条件下,试探究在第一象限内,抛物线上是否存在一点E使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de71ec611b70f0dbbf14f30c933d8711.png)
(3)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fdb48aaf0f4a2451390d27fb5f510a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/046aa9bbeea0009491581f881e429bd3.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0497041cf743704232f849c01bfa80.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a77f8493417b3c920976c8abb340569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdc829ee5eb97cd5d926b246468b15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4f1f1ac40658d264845f11836c2595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c8546ccbb27ac337a6daa5f32631af.png)
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解答题-问答题
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(0.65)
【推荐1】如图,抛物线
经过
,
两点,与
轴交于点
,直线
与
轴交于点
,与
轴交于点
.
(1)求抛物线的解析式;
(2)
为抛物线上的点,连接
交直线
于
,当
是
中点时,求点
的坐标;
(3)
在直线
上,当
为直角三角形时,求出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.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/1e091cface0c4a22727634eb480562d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/7aa5b147-31a5-49b4-8819-0331c98e1bd1.png?resizew=183)
(1)求抛物线的解析式;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989bd3073d980def40e1f602d00b63da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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名校
【推荐2】如图,抛物线
与x轴交于A、B两点(点A在点B的左侧),与y 轴交于
,且二次函数的最大值为4.
(2)P是抛物线
上一动点,连接
,以点P为直角顶点,构造等腰
,是否存在点P,使点Q恰好在直线
上?若存在,求出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96dde9c4aad0536c069127df0d4b12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20a7d8670dd0762eb8ed4c75714d999.png)
(2)P是抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96dde9c4aad0536c069127df0d4b12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4656b00c68d4385a7c51dbefac8c46c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
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