1 . 一段长为
的墙
前有一块矩形
空地,用
长的篱笆围成如图所示的图形(靠墙的一边不用篱笆,篱笆的厚度忽略不计),其中四边形
和四边形
是矩形,四边形
是边长为
的正方形,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/bb3a0f17-56b5-47a7-baa3-4760a5b2392c.png?resizew=192)
(1)若矩形
的面积为
,求
的长;
(2)当
的长为多少时,矩形
的面积最大,最大面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146ea9ed5176797da555a70bbe9602c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5027d70cdba7547cc6e256c9be723c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f11ec32d910488c76cb1b4652948218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d996b7cb0eeb4baad6bd1bdfeb99281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10eec76d00779458ce81639d71c635d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585c0b361a3e508f3dbb27a40b2dad5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eebf1bdce2d8a23bf9c54944e3c506d5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/bb3a0f17-56b5-47a7-baa3-4760a5b2392c.png?resizew=192)
(1)若矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d996b7cb0eeb4baad6bd1bdfeb99281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b883810d259ddcef5e981927ee5a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2 . 如图,在矩形
中,
,
,点
和点
分别为
边和
边上的动点,且满足
,则当
的面积最大时,
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/6b2f22b058793ad378d807517c79d8f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c495b8fd7f7bb21c177c9d50fbf6919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/0caa201a-ff90-4157-89f3-5d1b272ad739.png?resizew=114)
您最近一年使用:0次
2024-02-03更新
|
68次组卷
|
2卷引用:陕西省渭南市白水县2023-2024学年九年级上学期期末数学试题
3 . 如图,老李想用长为
的栅栏,再借助房屋的外墙(外墙足够长)围成一个矩形羊圈
,并在边
上留一个
宽的门(建在EF处,另用其他材料).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/822a392f-99c2-4c33-945c-7fd0c287ac1a.png?resizew=171)
(1)当羊圈的长和宽分别为多少米时,能围成一个面积为
的羊圈?
(2)按照这样的围法,羊圈能达到的最大面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d112c9693aa126c92bf1402a1f66bcb.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/f71a41641aa0d0e45a3c03d3d2c1196b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/822a392f-99c2-4c33-945c-7fd0c287ac1a.png?resizew=171)
(1)当羊圈的长和宽分别为多少米时,能围成一个面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46a624ca5623fc427f6055b6185f7cd.png)
(2)按照这样的围法,羊圈能达到的最大面积是多少?
您最近一年使用:0次
4 . 如图,抛物线过点
,
,矩形
的边
在线段
上(点B在点A的左侧),点C、D在抛物线上,
,当
时,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/11fc3da1-8473-4214-8324-67f9ab3d18be.png?resizew=155)
(1)求抛物线所对应的函数表达式;
(2)当t为何值时,矩形
的周长有最大值?最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1a9821a00b71f6b7d7a76d91b3f810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56dae6ce1d64de30d354ee9f89d98bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f7d59f0b892737e233e68b34e0aa64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/11fc3da1-8473-4214-8324-67f9ab3d18be.png?resizew=155)
(1)求抛物线所对应的函数表达式;
(2)当t为何值时,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
5 . 如图,在平面直角坐标系中,将抛物线
先向右平移2个单位长度,再向下平移4个单位长度,得到抛物线
,则抛物线
的表达式为____________________ ;抛物线
的对称轴与
分别相交于点M,N,则
的面积为____________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546c625899788966895edb3a5f5d3c90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/f561d749-25b7-4baa-a79b-5f92fcd0f006.png?resizew=143)
您最近一年使用:0次
6 . 劳动是财富的源泉,也是幸福的源泉.某中学对劳动教育进行积极探索和实践,创建学生劳动教育基地,让学生参与到农耕劳作中.如图,现准备利用校园围墙的一段
(
最长可用
),用
长的篱笆,围成一个矩形菜园
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/a15fa4e5-f4fd-468f-a314-28d6c7416f89.png?resizew=235)
(1)当
长度为多少时,矩形菜园的面积为
?
(2)当
长度为多少时,矩形菜园的面积最大?最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146ea9ed5176797da555a70bbe9602c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c758c27bec97c234d1d818c40f3d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/a15fa4e5-f4fd-468f-a314-28d6c7416f89.png?resizew=235)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92057add5c62908986c807400deac166.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
7 . 如图,抛物线
经过
,点
两点,点D在该抛物线上运动,设点D的横坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/61238376-faf5-4137-9cd3-90cf967ed430.png?resizew=260)
(1)求该抛物线的解析式.
(2)当
时,过点D作
轴,交直线
于E点,求线段
的最大值.
(3)当
时,若抛物线在点D,点B之间部分(包括点D,点B两个端点)的最高点和最低点的纵坐标的差为3时,求m的值.
(4)设抛物线
与线段
围成的封闭图形记作图形P,点C为直线
上的一个动点(点C不与点A重合),设点C的横坐标为n,以
为边向下作正方形
,当M、N两点中只有一个点在图形P的内部时(不包括边界),直接写出n的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0310ce4692c85c9702f564923a55f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e88d726b4b2e4b54667da2b5851672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4efa1400ed18b2b4e9a51e3b9e4f4148.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/61238376-faf5-4137-9cd3-90cf967ed430.png?resizew=260)
(1)求该抛物线的解析式.
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19afe14bd5787129576061638a4f259c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd69e51abb06a0e6e43a878c7120bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f955e61b70463e9bb6758f1f863a1675.png)
(4)设抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.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/c545e1ea9de89cc190b767b6e24619c3.png)
您最近一年使用:0次
8 . 校艺术节上,甲同学用腰长为
的等腰直角三角形卡纸
裁剪出如图所示的矩形纸片
,且矩形的四个顶点都在
的边上.
(1)若甲裁剪出来的矩形纸片周长是
纸片周长的一半,那么这个矩形纸片的宽
是___________cm;
(2)设
的长度为
,矩形
的面积为
,
①求
关于
的函数解析式;
②求矩形
的面积
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe9f7abf7bcf4e1aa2579cd191d7761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/395bf903-6582-4b69-acd4-02614fbba969.png?resizew=147)
(1)若甲裁剪出来的矩形纸片周长是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d9dd7d02748803df34f18d3a05d0543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921abeb6b0f221c8bd539642e57800fa.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②求矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
9 . 如图,用长为9m的铝合金条制成“日”字形窗框,若窗框的宽为xm,窗户的透光面积为
(铝合金条的宽度不计).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/5d378e6f-d682-4dfd-8804-8b2bd9100c71.png?resizew=95)
(1)求出y与x的函数关系式;(写出自变量x的取值范围)
(2)能否使窗的透光面积达到3平方米,如果能,窗的高度和宽度各是多少?如果不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a20728e9a9e3018723f2a86f24f332.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/5d378e6f-d682-4dfd-8804-8b2bd9100c71.png?resizew=95)
(1)求出y与x的函数关系式;(写出自变量x的取值范围)
(2)能否使窗的透光面积达到3平方米,如果能,窗的高度和宽度各是多少?如果不能,请说明理由.
您最近一年使用:0次
10 . 问题提出
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/cd54c51a-39ce-45a6-997c-603be8084cf2.png?resizew=506)
图1 图2 图3
(1)如图1,已知矩形
的面积为42,点
、
分别在边
、
上,连接
,若
,
,则四边形
的面积为__________;
问题探究
(2)如图2,已知
中,
,
,
,边
的垂直平分线分别交
、
于点
、
,连接
,过点
作
,垂足为
.求
、
的长;
问题解决
(3)现要对一块四边形空地
进行规划,其示意图如图3所示,其中
,
,连接
,
,
,在
上找点
,过点
作
于点
,连接
,根据规划在
与
区域种植花卉,其余区域种植草坪.
①设
的长为
,
和
的面积之和为
,求
与
之间的函数关系式;
②种植花卉每平方米需花费0.01万元,种植花卉至少需要总费用多少万元?
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/cd54c51a-39ce-45a6-997c-603be8084cf2.png?resizew=506)
图1 图2 图3
(1)如图1,已知矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e7c422a19b68b8b4cd484d22897e3a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f218914337edd06e59e75d90b777e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4465a96d65de0f859ea4ec9e548204d7.png)
问题探究
(2)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6f3d14d4c0d628472a0b5dbd603f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df308527607ac9c4b7feb299659b1b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf23e73ae2a15c04bbed3981cb8e511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
问题解决
(3)现要对一块四边形空地
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3e85929066e731dd6622524995a4f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73fa0275d040a72093dd101a0d3752ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587458141d890533c0c32aa249a27ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d04cda82e68384a1dc00dd7cca92e489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6074f4beb31fb393ae3978e0035ae16f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16a105649c15ef9598a6df8d794deb38.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3bde6ef2ee5b749b4d48d706543cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6074f4beb31fb393ae3978e0035ae16f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16a105649c15ef9598a6df8d794deb38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a20728e9a9e3018723f2a86f24f332.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②种植花卉每平方米需花费0.01万元,种植花卉至少需要总费用多少万元?
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