已知二次函数y=ax2+bx+c(a≠0)的图象与x轴交于A(﹣3,0),B(1,0)两点,与y轴交于点C(0,﹣3m)(m>0),顶点为D.
![](https://img.xkw.com/dksih/QBM/2022/3/4/2929105670119424/2932448594608128/STEM/44bd58c174da4e66ba0cd21256837575.png?resizew=404)
(1)如图1,当m=1时,
①求该二次函数的解析式;
②点P为第三象限内的抛物线上的一个动点,连接AC、OP相交于点Q,求
的最大值;
(2)如图2,当m取何值时,以A、D、C为顶点的三角形与△BOC相似.
![](https://img.xkw.com/dksih/QBM/2022/3/4/2929105670119424/2932448594608128/STEM/44bd58c174da4e66ba0cd21256837575.png?resizew=404)
(1)如图1,当m=1时,
①求该二次函数的解析式;
②点P为第三象限内的抛物线上的一个动点,连接AC、OP相交于点Q,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7945f52511981402a8e648fb1b38796d.png)
(2)如图2,当m取何值时,以A、D、C为顶点的三角形与△BOC相似.
更新时间:2022-03-09 12:24:50
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【推荐1】二次函数y=ax2+bx+c的图象过A(﹣3,0),B(1,0),C(0,3),点D在函数图象上,点C,D是二次函数图象上的一对对称点,一次函数图象过点B,D,求:
(1)一次函数和二次函数的解析式;
(2)写出使一次函数值大于二次函数值的x的取值范围.
(1)一次函数和二次函数的解析式;
(2)写出使一次函数值大于二次函数值的x的取值范围.
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【推荐2】如图,已知二次函数
的图象顶点A在x轴上,且
,与一次函数
的图象交于y轴上一点B和另一交点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/df94b81e-30e8-4750-b9fb-388d5c38db67.png?resizew=197)
(1)求抛物线的解析式;
(2)点D为线段
上一点,过点D作
轴,垂足为E,交F抛物线于点F,请求出线段
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7090adf670566a2d7ce5903924d72f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/df94b81e-30e8-4750-b9fb-388d5c38db67.png?resizew=197)
(1)求抛物线的解析式;
(2)点D为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d84acd3c96e20c0ce064aac125f7fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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【推荐1】如图,在平面直角坐标系中,过点A
的直线l分别与x轴、y轴交于点C,D.
(1)求直线l的函数表达式.
(2)P为x轴上一点,若△PCD为等腰三角形直接写出点P的坐标.
(3)将线段AB绕B点旋转90°,直接写出点A对应的点A的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a414075069b61fcef06bd27e99ec47.png)
(1)求直线l的函数表达式.
(2)P为x轴上一点,若△PCD为等腰三角形直接写出点P的坐标.
(3)将线段AB绕B点旋转90°,直接写出点A对应的点A的坐标.
![](https://img.xkw.com/dksih/QBM/2019/6/2/2216803108290560/2219749342404608/STEM/0c59a387d5f94176b40193988a59ec84.png?resizew=116)
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【推荐2】等边
边长为
,
为
边上一点,
,且
、
分别于边
、
交于点
、
.
如图
,当点
为
的三等分点,且
时,判断
的形状;
如图
,若点
在
边上运动,且保持
,设
,四边形
面积的
,求
与
的函数关系式,并写出自变量
的取值范围;
如图
,若点
在
边上运动,且
绕点
旋转,当
时,求
的长.
![](https://img.xkw.com/dksih/QBM/2018/10/20/2057683309248512/2064760145035264/STEM/29909219-f06c-4457-8006-16cb8fdca5fc.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/2018/10/20/2057683309248512/2064760145035264/STEM/c8201722-f68d-4099-8053-243c42e23291.png?resizew=142)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd8cadfd22e5db4cfbe5cb30475b2e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d9792485ccd1ba479ceba6397c15ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1b418d67b301ebfd7db583aa176e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.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/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3608d2465719376b0388c866f0ab9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67fb4c466ae652f9936f3cc35a3f6e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf8798d59d5a6c916311c96f5de3fc13.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3608d2465719376b0388c866f0ab9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ee850dd36bd4879c52e7bd5ef65031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50aa418020b5d2d28ca93f13b07d882b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1688588178bbd3ae8c2bdd1f3d1087d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba441131061f773ab758b740dae3ad9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/301578114cf0b1c7c173dd37bd7cfb41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3137705cb4170baafa66ff46eefb7a.png)
![](https://img.xkw.com/dksih/QBM/2018/10/20/2057683309248512/2064760145035264/STEM/29909219-f06c-4457-8006-16cb8fdca5fc.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/2018/10/20/2057683309248512/2064760145035264/STEM/c8201722-f68d-4099-8053-243c42e23291.png?resizew=142)
![](https://img.xkw.com/dksih/QBM/2018/10/20/2057683309248512/2064760145035264/STEM/0065ee44-4e6b-4d40-a641-f72d6b3387fe.png?resizew=166)
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【推荐1】如图1,在平面直角坐标系中,抛物线
与x轴交于A、B两点(点A在点B的右侧),与y轴交于点C,
,
,点
,
,连接
.
(1)求抛物线的解析式;
(2)点F是线段
上一点,过点F作
轴交抛物线于点E,交
于点M,点N是直线
上一点,
,当
的周长最大时,求点E的坐标和此时
周长最大值;
(3)如图2,已知
.点P为直线
上一动点,连接
,将抛物线上下平移,平移后的抛物线左侧部分经过点P;当
是以
为腰的等腰三角形时,求抛物线的平移距离d.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3dfcd8aff269dd5aba398816490c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a99044cdedf9e67bffd16a7eeeadf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ec7f84f716a316ec92d133927666c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78691dacfa00dd2448b1ba94b264ec8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/6/46ac461d-d128-4c15-899b-735f726979ec.png?resizew=157)
(1)求抛物线的解析式;
(2)点F是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf783d3172debc69f963495e5bff78d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304bacefe6848156df2b6331e971c492.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c48e42ce4fd7e6da946bf2b7b22200db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c48e42ce4fd7e6da946bf2b7b22200db.png)
(3)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90726160ce5046924d4549d9b2040c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/6/0111af62-08af-48d3-b85b-c6e3003bd3b4.png?resizew=178)
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【推荐2】如图,抛物线
与x轴交于点
、B,与y轴交于点
,直线l是抛物线的对称轴.
![](https://img.xkw.com/dksih/QBM/2023/3/30/3205800419213312/3205963755552768/STEM/a602d3ad8f8544548fbf40410530fcf3.png?resizew=141)
(1)求抛物线的函数解析式;
(2)在对称轴l上是否存在点M,使
为等腰三角形,若存在,求出所有符合条件的点M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/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://img.xkw.com/dksih/QBM/2023/3/30/3205800419213312/3205963755552768/STEM/a602d3ad8f8544548fbf40410530fcf3.png?resizew=141)
(1)求抛物线的函数解析式;
(2)在对称轴l上是否存在点M,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40c49d6e2fc6fbdc21ff61841b586a6.png)
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【推荐1】如图,抛物线
与
轴交于
,
两点(点
在点
的左侧),与
轴交于点
,顶点为
,抛物线的对称轴与
轴交于点
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/426ce94c-0237-41c7-8358-d906657dafd5.png?resizew=189)
(1)求点
,
,
,
的坐标;
(2)点
为抛物线对称轴上的动点,且
与
相似,请直接写出符合条件的点
的坐标;
(3)点
为抛物线上的动点,是否存在这样的点
,使
是直角三角形?若存在,请求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be97ccb1db99a1761820dfd878b95926.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/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/8455657dde27aabe6adb7b188e031c11.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/426ce94c-0237-41c7-8358-d906657dafd5.png?resizew=189)
(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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)点
![](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/df7f9f7952c4be18cb73393047c2ad75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】如图1,在平面直角坐标系中,
为坐标原点,抛物线
经过
,
,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/2021/8/30/2797205477941248/2805066598916096/STEM/9bedfbb7e6fc484a84e7fe0fd7b91caf.png?resizew=329)
(1)求地物线的解析式.
(2)如图2,点
为拋物线第四象限上一点,
交
轴于
,设点
的横坐标为
,求线段
的长
与
的函数关系式(不要求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/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437f923730cfbd1bc6f62738d607eca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/2021/8/30/2797205477941248/2805066598916096/STEM/9bedfbb7e6fc484a84e7fe0fd7b91caf.png?resizew=329)
(1)求地物线的解析式.
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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