名校
1 . 已知抛物线
,过点
.
(1)求a,b之间的关系;
(2)若
,抛物线
在
的最大值为
,求a的值;
(3)将抛物线
向右平移
个单位,再向上平移1个单位,得到的新抛物线顶点记为点P,若
为任意正实数时,总有
,求c的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff52033035b3f8a53e845f2379ab3e52.png)
(1)求a,b之间的关系;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239ea0e903fbb4c8ce04133b9969578c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb437ef420d5118409e0e16819c573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7570c77bd375f4dfdffee64fce8d1a9a.png)
(3)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70444e3a66d1068038c5b5a77c7954aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce5b30848a291cec1b1e0e43a24431f.png)
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2023-04-15更新
|
1022次组卷
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6卷引用:2023年广西壮族自治区中考三模数学试题
名校
2 . 抛物线过点
、
、
,平行于x轴的直线
交抛物线于点
、D,以
为直径的圆交直线
于点
、
,则
的值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/7322599e-8293-4118-874d-2bb56b1214a1.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbdef5d0c05acbf63fa72fa85c5bb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594b0c17118a9055910a2ee5d631d611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/be94aa21e66431498afa79ddd8be4977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/7322599e-8293-4118-874d-2bb56b1214a1.png?resizew=162)
A.2 | B.4 | C.5 | D.6 |
您最近一年使用:0次
2023-03-28更新
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270次组卷
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3卷引用:广西壮族自治区南宁市广西大学附属中学2023-2024学年九年级上学期11月月考数学试题
3 . 如图,利用一面墙(墙长为15m),用30m的篱笆围成两块大小相同的矩形菜地,设菜地的一边
长为xm,矩形
的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/52617506-a4b3-4671-ab25-755c8f0c7088.png?resizew=150)
(1)求y与x的函数关系式,并写出x的取值范围;
(2)矩形
的面积能否为
,若能,请求出
的长;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c73ce6f702abb54b4a2268de70ddf20.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/52617506-a4b3-4671-ab25-755c8f0c7088.png?resizew=150)
(1)求y与x的函数关系式,并写出x的取值范围;
(2)矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f5cbf491c12002804cf10acf03cdec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2023-03-19更新
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2卷引用:广西壮族自治区河池市2022-2023学年九年级上学期期末数学试题
4 . 如图1,拋物线
与x轴交于
,
两点,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/0b63bc6a-c218-4455-ba89-67f90dd03088.png?resizew=343)
(1)求该拋物线的函数表达式;
(2)在平面直角坐标系内是否存在一点P使得以A、B、C、P为顶点的四边形为平行四边形?若存在,请直接写出所有满足该条件的点P的坐标;若不存在,请说明理由;
(3)如图2,若点D在该抛物线上且横坐标为2,直线l与抛物线交于A,D两点,点M在y轴上,当
时,求点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c22804f52986009170586c673342d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/0b63bc6a-c218-4455-ba89-67f90dd03088.png?resizew=343)
(1)求该拋物线的函数表达式;
(2)在平面直角坐标系内是否存在一点P使得以A、B、C、P为顶点的四边形为平行四边形?若存在,请直接写出所有满足该条件的点P的坐标;若不存在,请说明理由;
(3)如图2,若点D在该抛物线上且横坐标为2,直线l与抛物线交于A,D两点,点M在y轴上,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4957494d6ab4e58fde31a2bbcf664e.png)
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2023-03-16更新
|
457次组卷
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4卷引用:2023年广西柳州市柳北区鱼峰区九年级第一次联考数学试题
2023年广西柳州市柳北区鱼峰区九年级第一次联考数学试题(已下线)黄金卷04-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(长沙专用)湖南省株洲市茶陵县2022-2023学年九年级下学期期中考试数学试题2023年山东省东营市中考数学模拟预测题(5月份)
5 . 如图,在预防新冠肺炎疫情期间,某校在校门口用塑料膜围成一个临时隔离区,隔离区一面靠长为
的墙(隔离区靠墙这面不需要塑料膜),隔离区分成两个区域,中间用塑料膜隔开,已知整个隔离区塑料膜总长为
,如果隔离区出入口的大小不计,并且隔离区靠墙的面不能超过墙长,设垂直于墙的一边为
为
,隔离区面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/d50f7ade-0a7e-45f8-8f19-788796a15474.png?resizew=175)
(1)求S关于x的函数解析式;
(2)如果要围成面积为
的隔离区,那么
的长为多少?
(3)求隔离区
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d4166fee97516ad1b1d4759a8e4ce6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1611d15c7e1e4ab4a4a61537b3989d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3bde6ef2ee5b749b4d48d706543cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa2d65026770c5505f8adeb450e43b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/d50f7ade-0a7e-45f8-8f19-788796a15474.png?resizew=175)
(1)求S关于x的函数解析式;
(2)如果要围成面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc49f474f44f2396aa82a1a2c96459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
(3)求隔离区
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
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6 . 已知四边形
是边长为1的正方形,点E是边
上的动点,以
为直角边在直线
的上方作等腰直角三角形
与
分别相交于点P、Q,连接
,过点A作
,垂足为点M,过点P作
,垂足为点N,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/b7a6c8dc-b6df-46df-8c3b-096f99a8d5e9.png?resizew=198)
(1)求
的长;
(2)用含有m的代数式表示
;
(3)用含有m的代数式表示
,并求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c6af6193c86ac1dbd1c20fc77ac6c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57db9134786f18237bd709544fdcf641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba9cf1bdc2b9dbec7fd2a7b387d72176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2d9d9adad09281ca67132bdce523fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/b7a6c8dc-b6df-46df-8c3b-096f99a8d5e9.png?resizew=198)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)用含有m的代数式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
(3)用含有m的代数式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
您最近一年使用:0次
7 . 如图,小亮父亲想用长为80m的栅栏,再借助房屋的外墙围成一个矩形的羊圈ABCD,已知房屋外墙长50m,当AB的长等于______ m时,羊圈的面积最大.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/f7beb171-f6ab-4e11-8d71-8f97aaf5d97c.png?resizew=143)
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2023-03-09更新
|
249次组卷
|
2卷引用:广西南宁市邕宁民族中学2023-2024学年九年级上学期开学考试数学试题
8 . 如图,在
中,
,
,矩形
的顶点C、D、F分别在边
、
、
上,若
,则矩形
面积的最大值![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32268e2ccf8f7bc6fe5787ec49958a6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07893e4b9cd357c09e03dca2871fbe15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
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2023-12-12更新
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205次组卷
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2卷引用:2024年广西初中学业水平模拟测试(三)数学试题
9 . 为了有效预防和控制疫情,及时监测疫情发展态势,实施定期核酸检测.某社区准备搭建一个动态核酸检测点,现有33米可移动的隔离带,围成如图的临时检测点,这是一个一面靠墙(墙面为
)的矩形,内部分成两个区,
区为登记区,
区为检测区,入口通道在
边上,两区通道在
边上,出口通道在
边上,通道宽均为1米.设
,矩形
的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/fab130fc-cbdf-4593-9dc1-5ce3402715a8.png?resizew=263)
(1)
可表示为________;
(2)当
为何值时,
有最大值?最大值是多少?
(3)所围成矩形
的面积能否达到96平方米?如果能,求出
的长;如果不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7a3d679b4dae63575903387a76ce45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/fab130fc-cbdf-4593-9dc1-5ce3402715a8.png?resizew=263)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
(3)所围成矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
10 . 在周长为
的矩形铁片上剪去一个边长等于矩形宽
的等边三角形,设剩下的面积为
,求
与
的函数关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d51b21602ca6906279ecb645bfd12fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740004cfdade4c185f722dadc27e15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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