1 . 九年级一班的同学计划在劳动实践基地内种植蔬菜,班长买回来10米长的围栏,准备围成一边靠墙(墙足够长)的菜园,为了让菜园面积尽可能大,同学们提出了围成矩形,等腰三角形(底边靠墙),半圆形这三种方案,最佳方案是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/8141aa46-12f5-4ada-ad8c-ad5f3307d22f.png?resizew=452)
A.方案1 | B.方案2 | C.方案3 | D.三种方案使得菜园面积一样大 |
您最近一年使用:0次
2 . 如图,要围一个矩形菜园
,其中一边
是墙,且
的长不能超过
,其余的三边
,
,
用篱笆,且这三边的和为
,有下列结论:①
的长可以为
;②
的长有两个不同的值满足菜园
面积为
;③菜园
面积的最大值为
.其中,正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/9cb68f31-6e9f-4e7d-a9a5-2e56ba8a7185.png?resizew=178)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/c17cf43f666b86f28fc8e1b918584b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c758c27bec97c234d1d818c40f3d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7a1de5f31661e80f9259009c82f00c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30414777b108d2fb1cdabd09c265a30.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/9cb68f31-6e9f-4e7d-a9a5-2e56ba8a7185.png?resizew=178)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
3 . 如图,要围一个矩形菜园
,其中一边
是墙,且
的长不能超过
,其余的三边
用篱笆,且这三边的和为
.
(1)
的长度是否能有两个不同的值都满足菜园面积为
?说明理由.
(2)当
的长为多少时,围成的菜园面积最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a2a22b619012e9a21727fad38491e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6afaf901483263a6d636ead86b83c446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9166a6de3f2debeb60a7f297f5fd08.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/08b44fcf-b866-4193-87f8-94f9d23d4615.png?resizew=137)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef241bca40db1083ad60539abf477a6.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
您最近一年使用:0次
2023-11-03更新
|
185次组卷
|
3卷引用:天津市河西区2023-2024学年九年级上学期期中数学试题
天津市河西区2023-2024学年九年级上学期期中数学试题(已下线)专题05 函数模型解决实际问题(3大易错点分析)-备战2024年中考数学考试易错题(天津专用)甘肃省武威市凉州区第二十四中学2023-2024学年九年级上学期12月月考数学试题
解题方法
4 . 抛物线
的顶点为
,与
轴交于点
和
(点
在点
的右侧),与
轴交于点
,直线
是抛物线的对称轴.
(1)当
时,求顶点P的坐标;
(2)将抛物线向左平移1个单位长,向上平移2个单位长,所得抛物线的顶点
恰好与点C重合,求平移后所得抛物线的解析式;
(3)设E是直线
上的一点,F是直线
上的一点,若四边形
的三边
的最小值为5,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8580445c2a200ba9d6d68412f6ee2b6b.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/5963abe8f421bd99a2aaa94831a951e9.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/5963abe8f421bd99a2aaa94831a951e9.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
(2)将抛物线向左平移1个单位长,向上平移2个单位长,所得抛物线的顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
(3)设E是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eeca5ddb804f1128921703b97f8d315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
5 . 九年级某班计划在劳动实践基地内种植蔬菜,班长买回来8米长的围栏,准备围成一边靠墙(墙足够长)的菜园,为了让菜园面积尽可能大,同学们提出了围成矩形、等腰直角三角形(底边靠墙)、半圆形这三种方案,如图所示,最佳方案是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/25/043f62da-84a4-4639-89a8-4f6755e5c541.png?resizew=407)
A.方案1 | B.方案2 | C.方案3 | D.面积都一样 |
您最近一年使用:0次
真题
名校
6 . 如图,要围一个矩形菜园
,共中一边
是墙,且
的长不能超过
,其余的三边
用篱笆,且这三边的和为
.有下列结论:
①
的长可以为
;
②
的长有两个不同的值满足菜园
面积为
;
③菜园
面积的最大值为
.
其中,正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/64d28d118793ef67987184935411e614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b467455ea6b8b7f5e6dd53110bc22060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edc8cf5b8934480e6031f16b3d4938d.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d568856b3349a45f8b95d4a6454a858.png)
②
![](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/a1b4693abf395a9bbd165b90bc932080.png)
③菜园
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a4fd0755fd6e354e4f58fbb08e8f2b.png)
其中,正确结论的个数是( )
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2023-06-20更新
|
3413次组卷
|
19卷引用:2023年天津市中考数学真题
2023年天津市中考数学真题(已下线)2023年天津市中考数学真题变式题11-15题天津市第五十五中学2023-2024学年九年级上学期第一次月考数学试题天津市汇文中学2023-2024学年九年级上学期第二次月考数学试题(已下线)第22单元02基础练(已下线)专题18二次函数的应用(优选真题60道)-学易金卷:三年(2021-2023)中考数学真题分项汇编【全国通用】(已下线)第22章 二次函数(单元测试·拔尖卷)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题22.33 实际问题与二次函数(直通中考)(基础练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)湖北省天门市七校联考2023-2024学年九年级上学期月考数学试题(已下线)XDRzkgssxzw939山东省德州市天衢新区2023-2024学年九年级上学期期中数学试题(已下线)清单02二次函数(14个考点梳理+题型解读+核心素养提升+中考聚焦)-2023-2024学年九年级数学上学期期末考点大串讲(人教版)(已下线)专题2 函数思想【43311379】3.7 函数的实际应用-【智乐星中考·中考备战】2024年山东省中考数学精练本河南省焦作市沁阳市2023-2024学年九年级上学期第一次阶段性质量检测数学试题(已下线)专题05用二次函数解决问题(3个知识点4种题型3个中考考点)-【帮课堂】2023-2024学年九年级数学下册同步学与练(苏科版)(已下线)专题12 二次函数(考点回归+练透中考10类核心重点考向)-备战2024年中考数学真题题源解密(全国通用)(已下线)热点05+二次函数的图象及简单应用1(8大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(全国通用)2024年河北省邯郸市第十三中学中考模拟数学试题
名校
7 . 如图,用20米长的篱笆围成一个一边靠墙的矩形花圃(墙足够长),设垂直于墙的一边长为x米矩形花圃的面积为y平方米.
(1)写出y关于x的函数解析式;
(2)当x为多少时,矩形花圈的面积最大?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/3d88261e-366e-4d7d-b574-a81b5a61f0e0.png?resizew=164)
(1)写出y关于x的函数解析式;
(2)当x为多少时,矩形花圈的面积最大?
您最近一年使用:0次
2023-10-23更新
|
796次组卷
|
3卷引用:天津市滨海新区中新天津生态城第一中学2022-2023学年九年级上学期第一次月考数学试题
8 . 平面直角坐标系中,正方形
的点
在
轴上,点
在
轴上,点
,另有一动点
,连接
.
(1)如图,当点
在
边上时,将
绕点
顺时针旋转90°,得到
,连接
交
轴于点
.
①若点
的坐标为
,求线段
的长;
②设点
,
,试用含
的式子表示
.
(2)当点
满足
,(点
不与点
其合),连接
.现在以
为中心,将
顺时针旋转60°,得到
,求当
取得最大值时点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/24705e5759ac944559f305c694c9f6d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(1)如图,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01b9de38c02e28c475bf639727b59e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/2023/6/10/58d3496f-d667-44c1-8ea8-4b82d24ee788.png?resizew=154)
①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238f0ea276a00ae8d681ce00cc11c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
②设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17c7608edaf9a0fa498674d5c729ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bac18a47610241e4771ce46e3dbb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/accad1bfa70bdcd7736bd9637fbd9ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
名校
9 . 如图1所示的矩形窗框
的周长及其两条隔断
、
的总长为
米,且隔断
、
分别与矩形的两条邻边平行,设
的长为
米,矩形
的面积为
平方米,
关于
的函数图像如图2,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/36be6e96-758e-425e-ad23-dd4b87fecb28.png?resizew=271)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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://img.xkw.com/dksih/QBM/editorImg/2023/5/12/36be6e96-758e-425e-ad23-dd4b87fecb28.png?resizew=271)
A.矩形![]() | B.![]() ![]() ![]() |
C.当![]() ![]() | D.![]() |
您最近一年使用:0次
2023-05-09更新
|
372次组卷
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5卷引用:2023年天津市中考数学真题变式题11-15题
10 . 一块三角形材料如图所示,
,
,
.用这块材料剪出一个矩形
,其中,点D,E,F分别在
,
,
上,要使剪出的矩形
的面积最大,点E应选在何处?矩形
的最大面积是多少?说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/38381064-3390-4a0b-a148-efb2664cd1ad.png?resizew=84)
(1)根据题意完成下面填空:若设
,则
;
;
(2)请你继续完成对本题的解答.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/38381064-3390-4a0b-a148-efb2664cd1ad.png?resizew=84)
(1)根据题意完成下面填空:若设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0124d4c22e17a6b719cf2d0f0b305e4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
(2)请你继续完成对本题的解答.
您最近一年使用:0次
2023-02-20更新
|
335次组卷
|
3卷引用:天津市河西区2022-2023学九年级上学期期末数学试卷
天津市河西区2022-2023学九年级上学期期末数学试卷 天津市河西区2022-2023学年九年级下学期数学开学试题(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)