名校
1 . 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),用长为28米长的篱笆围成一个矩形花园
(篱笆只围
、
两边),设
米,花园面积
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/1cf59d13-95aa-4a00-85c6-3a99c254378e.png?resizew=139)
(1)写出
关于
的函数解析式,当
平方米,求
的值;
(2)若在
处有一棵树与墙
、
的距离分别是15米和6米,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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7a3d679b4dae63575903387a76ce45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/1cf59d13-95aa-4a00-85c6-3a99c254378e.png?resizew=139)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdd7bd833cf026e1fc3bea3c882edb6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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名校
2 . 某饭店特制了一批高脚杯,分为男士杯和女士杯(如图1),相关信息如下:
根据以上素材内容,丵试求解以下问题:
(1)求抛物线
和抛物线
的解析式;
(2)当杯子水平放置及杯内液体(无泡沫)静止时,若男士杯中液体与女士杯中液体最深处深度均为
,求两者液体最上层表面圆面积相差多少?(结果保留
)
(3)当杯子水平放置及杯内液体(无泡沫)静止时,若男士杯中液体与女士杯中流体最深处深度相等,两者液体最上层表面圆面积相差
,求杯中液体最深度为多少?
| 内容 | |||||
| ![]() 高脚杯:如图1,类似这种杯托上立着一只细长脚的杯子.从下往上分为三部分:杯托,杯脚,杯体.杯托为一个圆;水平放置时候,杯脚经过杯托圆心,并垂直任意直径;杯体的水平横截面都为圆,这些圆的圆心都在杯脚所在直线上. | |||||
|
![]() ![]() ![]() ![]() ![]() 图2坐标系中,特制女士杯可以看作线段 ![]() ![]() ![]() | |||||
|
|
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c288e6de7e470011569e2b7f870779.png)
(2)当杯子水平放置及杯内液体(无泡沫)静止时,若男士杯中液体与女士杯中液体最深处深度均为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56817c785e9fa0c8616ec0a58358d634.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
(3)当杯子水平放置及杯内液体(无泡沫)静止时,若男士杯中液体与女士杯中流体最深处深度相等,两者液体最上层表面圆面积相差
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e4ce1055f76c7ae91c27ebc1cff4de.png)
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2023-12-14更新
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9卷引用:2023年浙江省绍兴市诸暨市中考一模数学试题
3 . 如图,某中学准备围建一个矩形苗圃,其中一边靠墙,另外三边用长为
米的篱笆围成,若墙长为
米,设这个苗圃垂直于墙的一边长为
米.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/19250b17-838e-4d18-9fa0-0e18990ba1e6.png?resizew=129)
(1)若苗圃园的面积为
平方米,求
的值;
(2)若平行于墙的一边长不小于
米,求这个苗圃园的面积有最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b837fd9c52f60bfb3b6852733abc790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/19250b17-838e-4d18-9fa0-0e18990ba1e6.png?resizew=129)
(1)若苗圃园的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若平行于墙的一边长不小于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
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4 . 如下图,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
,则菜园
面积的最大值为______
.
![](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/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9166a6de3f2debeb60a7f297f5fd08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/8332f3b3-799e-4300-b0e8-63b7f60db9bc.png?resizew=194)
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5 . 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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6 . 如图,矩形窗户边框
由矩形
,矩形
,矩形
组成,且
.已知制作一个窗户边框的材料的总长是6米,设
(米),窗户边框
的面积为S(
).
(1)①用x的代数式表示
;
②求x的取值范围.
(2)求当x取何值时,S达到最大,并求出最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8057131f4bae6260aaeda1eb3c77fb7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e877ca1e82f435fed02d61d5bab184d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e179ae57c5f1b5ba219d78f7433ff97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c91bb20a2a0d3b59f23cf5f0d645aca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781e56e25b06e8512793b95b76d0d966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f793fcfa981e4e3c34c9ccb7f1861a8d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/946c16f7-3bf2-4c4d-8f60-2fc346b84fe3.png?resizew=91)
(1)①用x的代数式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
②求x的取值范围.
(2)求当x取何值时,S达到最大,并求出最大值.
您最近一年使用:0次
2023-11-19更新
|
81次组卷
|
2卷引用:浙江省杭州市下城区杭州观成实验学校2023-2024学年九年级上学期期中数学试题
7 . 在2024年元旦即将到来之际,学校准备开展“冬日情暖,喜迎元旦”活动,小星同学对会场进行装饰.如图1所示,他在会场的两墙
、
之间悬挂一条近似抛物线
的彩带,如图2所示,已知墙
与
等高,且
、
之间的水平距离
为8米.
,
的高度是 米,抛物线的顶点坐标为 ;
(2)为了使彩带的造型美观,小星把彩带从点
处用一根细线吊在天花板上,如图3所示,使得点
到墙
距离为3米,使抛物线
的最低点距墙
的距离为2米,离地面2米,求点
到地面的距离;
(3)为了尽量避免人的头部接触到彩带,小星现将
到地面的距离提升为3米,通过适当调整
的位置,使抛物线
对应的二次函数的二次项系数始终为
,若设点
距墙
的距离为
米,抛物线
的最低点到地面的距离为
米,探究
与
的关系式,当
时,求
的取值范围.
![](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/372ad1814216fb7ebe39a0e067cf70be.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)为了使彩带的造型美观,小星把彩带从点
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)为了尽量避免人的头部接触到彩带,小星现将
![](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/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef06a3c4befc30945469d55bea138bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2023-11-18更新
|
435次组卷
|
6卷引用:浙江省台州市椒江区椒江区第二中学2023-2024学年九年级上学期12月月考数学试题
8 . 如图是一块篱笆围成的矩形土地
,并且由一条与
边平行的篱笆
分开,已知篱笆的总长为90米(厚度不计).设
米,
米.
(1)用含有
的代数式表示
.
(2)设矩形土地
面积为
平方米,当
时,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/457c6935fc4305838a02325c4e08017a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/9569009d-9ef6-4b18-8613-dcdef2a4e6cf.png?resizew=167)
(1)用含有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)设矩形土地
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e260e4f9c0d14808bc644cc83c60292c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
2023-11-15更新
|
128次组卷
|
4卷引用:浙江省杭州市余杭区2023-2024学年九年级上学期期中数学试题
名校
9 . 某小区有一块绿地如图中等腰直角
所示,计划在绿地上建造一个矩形的休闲书吧
,其中点P,M,N分别在边
,
,
上,记
,
,图中阴影部分的面积为S,当x在一定范围内变化时,y和S都随x的变化而变化,则y与x,S与x满足的函数关系分别是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187afae05a3bf2081bc7d381255bcc93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/ea98a1fefa6385dd05aded1ebce24edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fd22e3ef2e86ba904d30bc28d34b14.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/e6bf1f7f-1cda-4af8-a9f8-95ac32d8624b.png?resizew=120)
A.正比例函数关系,一次函数关系 | B.一次函数关系,二次函数关系 |
C.一次函数关系,一次函数关系 | D.正比例函数关系,二次函数关系 |
您最近一年使用:0次
2023-11-14更新
|
110次组卷
|
2卷引用:浙江省杭州市保俶塔申花实验学校2023-2024学年九年级上学期12月数学质量检测试题
10 . 要利用28米长的篱笆和一堵最大可利用长为12米的墙围成一个如图1的一边靠墙的矩形养鸡场,在围建的过程中遇到了以下问题,请你帮忙来解决.
(2)在(1)的前提条件下,要在墙上选一个点
,用不可伸缩的绳子分别连接
,
,点
取在何处所用绳子长最短?
(2)在(1)的前提条件下,要在墙上选一个点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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