1 . 如图,某校为响应国家“减负延时服务”,每见期安排一节劳动课,准备在校园里利用校围墙的一段
,再用篱笆围成一个中间有一道篱笆
的矩形茶园
,让学生在茶园里体验种茶活动.现已知校围墙
长13米,篱笆共40米长(篱笆用完),设
长
米,矩形茶园
的面积为
平方米(篱笆
占地面积忽略不计).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/1df609c2-ab2c-4190-8f51-0a1190958477.png?resizew=218)
(1)求
与
之间的函数关系式,并直接写出自变量的取值范围;
(2)求
的最大面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b0e8d6874ca0163575176a49accf45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/1df609c2-ab2c-4190-8f51-0a1190958477.png?resizew=218)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
2 . 根据以下素材,完成项目式探索任务:
问题的提出
根据以下提供的素材,在总费用(新墙的建筑费用与门的价格和)不高于6400元的情况下,如何设计最大饲养室面积的方案?
素材1:如图是某农场拟建两间矩形饲养室,饲养室的一面靠现有墙,中间用一道墙隔开,计划中建筑材料可建围墙的总长为
米,开2个门,且门宽均为1米.
素材2:2个门要求同一型号,有关门的采购信息如表.
素材3:与现有墙平行方向的墙建筑费用为400元/米,与现有墙垂直方向的墙建筑费用为200元/米.
问题的提出
根据以下提供的素材,在总费用(新墙的建筑费用与门的价格和)不高于6400元的情况下,如何设计最大饲养室面积的方案?
素材1:如图是某农场拟建两间矩形饲养室,饲养室的一面靠现有墙,中间用一道墙隔开,计划中建筑材料可建围墙的总长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/cbdf4119-2ab0-49dc-85fe-1282ad1c5518.jpg?resizew=174)
素材2:2个门要求同一型号,有关门的采购信息如表.
型号 | A | ![]() | ![]() |
规格(门宽) | 1米 | ![]() | 1米 |
单价(元) | 250 | 280 | 300 |
任务1 | 确定饲养室的形状 设 ![]() ![]() ![]() |
任务2 | 探究自变量![]() |
任务3 | 确定设计方案 我的设计方案是选型号 门,当 ![]() ![]() |
您最近一年使用:0次
3 . 用长为12米的铝合金型材做一个形状如图所示的矩形窗框,设矩形窗框的宽为x米,窗框的透光面积为S平方米.(铝合金型材宽度不计)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/6f2485b1-13f1-435f-92a2-71a1c1e5ae8d.png?resizew=148)
(1)求S与x的函数关系式,并写出x的取值范围.
(2)求x为多少时S取得最大值,并求S的最大值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/6f2485b1-13f1-435f-92a2-71a1c1e5ae8d.png?resizew=148)
(1)求S与x的函数关系式,并写出x的取值范围.
(2)求x为多少时S取得最大值,并求S的最大值.
您最近一年使用:0次
4 . 某校在基地参加社会实践活动中,带队老师考问学生:基地计划新建一个矩形的生物园地,一边靠旧墙(墙足够长),另外三边用总长
米的不锈钢栅栏围成,与墙平行的一边留一个宽为
米的出入口,如图所示,如何设计才能使园地的面积最大?下面是两位学生争议的情境:
请根据上面的信息,解决问题:
(1)设
米(
),试用含
的代数式表示
的长;
(2)求园地面积
与
的函数关系式;
(3)请你判断谁的说法正确,为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ddce6dd8d5630af4c38cf4010dbefa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/ab6dba81-82de-4f46-a946-a12f367ef9ca.jpg?resizew=343)
请根据上面的信息,解决问题:
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7a3d679b4dae63575903387a76ce45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求园地面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)请你判断谁的说法正确,为什么?
您最近一年使用:0次
名校
5 . 如图1,
是一块锐角三角形材料,边
,高
.
(1)要把它加工成正方形零件,使得正方形的一边在
上,其余两个顶点分别在
,
上,这个正方形零件的边长是多少;
(2)要把它加工成矩形零件,且矩形是由两个并排放置的正方形组成,如图2,此时,这个矩形零件的两条边长分别是多少;
(3)如果要加工的零件只是一个矩形,如图3,这样,此矩形零件的两条边长就不能确定,但这个矩形面积有最大值,求矩形的最大面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf57eef2bac6f23b54d87bd128fac25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b268b2129e91d0af3423f2c001653d75.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/bd10e54f-9a2a-47f2-a73f-e654fb9aea1b.png?resizew=534)
(1)要把它加工成正方形零件,使得正方形的一边在
![](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)
(2)要把它加工成矩形零件,且矩形是由两个并排放置的正方形组成,如图2,此时,这个矩形零件的两条边长分别是多少;
(3)如果要加工的零件只是一个矩形,如图3,这样,此矩形零件的两条边长就不能确定,但这个矩形面积有最大值,求矩形的最大面积.
您最近一年使用:0次
名校
6 . 如图,在等腰三角形
中,
,D是
边上的一个动点,(不与B、C重合)在
边上取一点E,使
.
(1)求证:
;
(2)设
,求y关于x的函数关系式并写出自变量x的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d93218586f810fd9cf345548ea7470f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be3b58a4087b4a569572d93feceaec1b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/5bc688b3-b30b-4da3-b16e-eb94bfa159c0.png?resizew=215)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbfb7665a54463b68487b6c53cdd97b3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3831b141230d8433e115d88a55eb6364.png)
您最近一年使用:0次
2023-12-09更新
|
159次组卷
|
2卷引用:北京市通州区20232024学年九年级上学期期中数学试题
名校
7 . 在矩形
中,
,
,点
从点
出发,沿
边向点
以
的速度运动(不与点
重合),同时点
从点
出发沿
边向点
以
的速度运动(不与点
重合),如果
,
两点同时出发,运动时间为
秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/484ba534-7e6d-4b8a-ade7-5831d77a686f.png?resizew=85)
(1)用
表示线段
,
的长度;
(2)几秒种后,
的斜边
长
?
(3)设运动开始后第
秒钟后,五边形
的面积为
写出
与
的函数关系式,当
为何值时,
最小?最小值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b35ed92397da56c7afbd6967597a9611.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/484ba534-7e6d-4b8a-ade7-5831d77a686f.png?resizew=85)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
(2)几秒种后,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c495b8fd7f7bb21c177c9d50fbf6919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c076056906cd59f7c4f782a4db28d907.png)
(3)设运动开始后第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16a9561c615656ef59fe37ea568a7367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ecfda698212594a342565257dc5508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
8 . 问题提出(1)当
时,二次函数
的最大值为______.
问题探究(2)已知二次函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c22804f52986009170586c673342d41.png)
是常数,
的图象经过
两点,平移该函数的图象,使其顶点始终在直线
上,求平移后所得抛物线与
轴交点的纵坐标的最大值.
问题解决(3)某养殖户利用一段围墙(围墙足够长)为一边,用总长为
的围网围成了如图所示的三块矩形区域,且这三块矩形区域的面积相等.设
的长度为
,矩形区域
的面积为
,当
为何值时,
有最大值?最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f22c4898e2a23e0e888b69d79719f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3236d825b994ee9c28e5d5479a57b8ed.png)
问题探究(2)已知二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c22804f52986009170586c673342d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51bc93f7a62885a5cac145ffab33528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28b08682efa2692b052f64fe1448fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/297797f0c11325bcc4b4923e37d6be5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
问题解决(3)某养殖户利用一段围墙(围墙足够长)为一边,用总长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ec72d07385ed62ec9540083958be2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3bde6ef2ee5b749b4d48d706543cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a20728e9a9e3018723f2a86f24f332.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/720c4897-3079-47e6-8590-10366813679d.png?resizew=130)
您最近一年使用:0次
2023-12-07更新
|
101次组卷
|
3卷引用:陕西省安康市岚皋县2023-2024学年九年级上学期期中数学试题
9 . 如图,在平面直角坐标系中,抛物线
交x轴于点A、B,交y轴于点C,
.
(1)求抛物线的解析式;
(2)P为第四象限抛物线上的一点,连接
并延长交y轴于点D,设点P的横坐标为t,
的面积为s,求s与t之间的函数关系式(不要求写出t的取值范围);
(3)在(2)的条件下,E为第二象限抛物线上的点,连接
,
,连接
交y轴于点F,若
,在抛物线上找到点G,使
,求点G的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66065ce144d3a12bb53c67d5ed87a50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e0c5cb53fd85b7a23f0580df6bb49a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/48a81e89-e2f4-41ea-8d60-9f1dee1ed277.jpg?resizew=413)
(1)求抛物线的解析式;
(2)P为第四象限抛物线上的一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
(3)在(2)的条件下,E为第二象限抛物线上的点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245f13cffbddce02a1f6d18854ce8664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415422a767b4917ba4c49bef94ef4cd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887a365981c5074233329c5c406cdcf1.png)
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10 . 已知点
是抛物线
对称轴上一点,连接
,以点
为旋转中心将
逆时针旋转
得到
,若点
恰好落在抛物线上时,则
的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/572f286fb45b2757af63569ae0bc2e99.png)
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