1 . 将一根长为
的铁丝首尾相接围成矩形,则该矩形面积的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知抛物线
(
,
,
为常数,
).抛物线顶点为
,与
轴分别交于点A,
(点A在点
左边),
为等腰直角三角形.
(1)当
,
,抛物线经过点
和
,求抛物线的解析式;
(2)求
的值;
(3)若经过点
的直线
与抛物线只有一个公共点,抛物线的对称轴与
轴交于点
,与直线
交于点
,求证:点
是线段
的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a783088120d67cc98936081e80fb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0529f6967e6d36703c2627b46d9097b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334052bf119b24c2e512dd8b55d141ab.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2321c8b7bfe7289f553f5d0ae6660bdf.png)
(3)若经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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3 . 如图,在四边形
中,
,
,
,若线段
在边
上运动,且
,则
的长为_____ ,
的最小值是 _____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85fb581e6a89ae40731b8619fff1e173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccaf196a35fcbda492cd202bcae27ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c096bd244d7e30e8ef26fb5278aac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf7f7ef712de18dc3612984bc319274.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/d1b04957-04ce-494f-83f8-730bfa6590e1.png?resizew=184)
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4 . 如图,某养殖户用
长的篱笆围成一个长方形养殖园,中间的两条篱笆隔离栏将这个长方形养殖园分割成三个较小的长方形,则围成养殖园的最大面积是______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa95874b57afccaf193c257d437e5a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
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5 . 有一个矩形苗圃园,其中一边靠墙,另外边用长为
的篱笆围成.已知墙长为
,若平行于墙的一边长不小于
,设这个苗圃园的宽
为
,面积为
,则
与
之间的函数表达式为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c08094f72d5bd69246c453dd28e33d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b749f9acb5f0de709a1709bbdd42614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea92883fe24b097c9a881ef8c92eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/71c15758-9bb0-4c72-86bb-fd09fbe74c49.png?resizew=193)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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6 . 某小区计划建一个矩形花圃,花圃的一边利用长为
的墙,另三边及中间的隔断用总长为
的篱笆围成.围成的花圃是如图所示的矩形
,并在
边上留有两扇
宽的门.设
边的长为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
,矩形花圃的总面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
.
(1)求
与
之间的函数关系式;
(2)求自变量
的取值范围;
(3)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1611d15c7e1e4ab4a4a61537b3989d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69b6eddd21064f4dcd7aee16edf6903.png)
![](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/1f328ba89c0a92a4447788b65571f7aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/cc2a2cdc-e96e-4e14-876a-d64af43787da.png?resizew=202)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求自变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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2023-11-24更新
|
99次组卷
|
2卷引用:安徽省安庆市宿松县2023-2024学年九年级上学期期中数学试题
7 . 如图1,E是正方形
的边
上一点(不与点B,C重合),连接
,以
为边向右作正方形
,连接
.已知
的面积(S)与
的长(x)之间的函数关系如图2所示,若该抛物线顶点P的纵坐标为8,则正方形
的边长为______ .
![](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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/f62e61f4-ca9e-4a2e-a6c4-228b93ef2613.png?resizew=383)
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8 . 用一条长
的绳子围成一个矩形,设矩形的一边长为
.
(1)若围成的矩形面积为
,求
的值;
(2)当
为何值时围成的矩形面积最大,最大面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57171806f407a98dd8a796d4d2d6bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
(1)若围成的矩形面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f44508a69ec50a20efabbe5ad12eaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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2023-11-22更新
|
108次组卷
|
5卷引用:广西壮族自治区玉林市容县2023-2024学年九年级上学期期中数学试题
广西壮族自治区玉林市容县2023-2024学年九年级上学期期中数学试题广西壮族自治区玉林市部分地区2023-2024学年九年级上学期期中阶段训练数学试题广西壮族自治区玉林市2023-2024学年九年级上学期期中数学试题(已下线)清单12 二次函数与实际问题(10种题型解读+提升训练)-2023-2024学年九年级数学上学期期末考点大串讲(苏科版)福建省漳州市芗城区厦门大学附属实验中学2023-2024学年九年级上学期月考数学试题
9 . 在美化校园的活动中,某兴趣小组想借助如图所示的直角墙角(两边足够长),用28m长的篱笆围成一个矩形花园
(篱笆只围
两边),设
,花园的面积为Sm2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/ebbfad4f-f193-4d82-9cfe-0f751c1a97a9.png?resizew=124)
(1)求S与x之间的函数表达式;
(2)若在P处有一棵树与墙
,
的距离分别是16m和6m,要将这棵树围在花园内(含边界,不考虑树的粗细)求花园面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ac400e3f5ba8b945bbef83db8611b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/ebbfad4f-f193-4d82-9cfe-0f751c1a97a9.png?resizew=124)
(1)求S与x之间的函数表达式;
(2)若在P处有一棵树与墙
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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2023-11-21更新
|
54次组卷
|
2卷引用:山东省烟台市蓬莱区2023-2024学年九年级上学期期中数学试题
10 . 某学校为了做好“创城”工作,不断美化环境,拟在一块空地上修建矩形绿色植物园,其中一边靠墙,可利用的墙长不超过
,另外三边由
长的栅栏围成,设矩形
空地中,垂直于墙的边
,面积为
(如图).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/ba19a94e-0357-4cc1-8951-1b7e42d3ee09.png?resizew=146)
(1)若矩形的面积为
,求x的值;
(2)求矩形的最大面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec34f87383502e5f792a330950ae981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f03c367201c385fcf9bdbf09d22b9e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ac400e3f5ba8b945bbef83db8611b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a20728e9a9e3018723f2a86f24f332.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/ba19a94e-0357-4cc1-8951-1b7e42d3ee09.png?resizew=146)
(1)若矩形的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fb5474bdc74da700b463eabd05bd8e.png)
(2)求矩形的最大面积.
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