1 . 用总长为a米的铝合金材料做成如图1所示的“日”字形窗框(材料厚度忽略不计),窗户的透光面积y(米2)与窗框的宽x(米)之间的函数图象如图2所示,则a的值是________ .
您最近一年使用:0次
2023-02-14更新
|
114次组卷
|
2卷引用:河南省南阳市宛城区2022-2023学年九年级上学期期末数学试题
2 . 某农场拟建两间矩形种牛饲养室,饲养室的一面靠已有的墙(墙长大于
),中间用一道墙隔开,正面开两个门,如图所示,已知每个门的宽度为
,计划中的建筑材料总长
,设两间饲养室的宽度为
,总占地面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/917e030d-3f04-43b9-baa1-10ee4547700b.png?resizew=228)
(1)求y关于x的函数表达式和自变量x的取值范围.
(2)求饲养室的宽度为多少
时,饲养室最大面积多少
?
(3)若要使两间饲养室合计占地总而积不低于
,求饲养室的宽度
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e6e72eff2450fd8a3f99600b300f0de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6244c4be2c661dc2166885d65bbad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047a04928a047a2e865f6fb252ed7ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3bde6ef2ee5b749b4d48d706543cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5e6560863ee663a60dc7932acb5cd3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/917e030d-3f04-43b9-baa1-10ee4547700b.png?resizew=228)
(1)求y关于x的函数表达式和自变量x的取值范围.
(2)求饲养室的宽度为多少
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba007666deb89951641bd1e24bc174a2.png)
(3)若要使两间饲养室合计占地总而积不低于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7f158de1e83b8c89914f0078571d0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3bde6ef2ee5b749b4d48d706543cdb.png)
您最近一年使用:0次
3 . 对于题目“一段抛物线L:
与直线l:
有唯一公共点.若c为整数,确定所有c的值.”甲的结果是
,乙的结果是
的整数,丙的结果是
的整数,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/9495df8e-660b-465b-a95f-225cac9d387a.png?resizew=151)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f3b2a04f483eca5a07f5fb03bd1a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1882d2f789de61b5b7e3ec952e13b99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30406906d14e1b1af3046efd29f24832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10f3d58995191690e857ecde027ed9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/9495df8e-660b-465b-a95f-225cac9d387a.png?resizew=151)
A.甲、乙的结果合在一起才正确 | B.乙、丙的结果合在一起才正确 |
C.甲、丙的结果合在一起才正确 | D.甲、乙、丙的结果合在一起才正确 |
您最近一年使用:0次
2023-02-12更新
|
212次组卷
|
3卷引用:河北省保定市竞秀区2022一2023学年九年级上学期期末学业质量监测数学试题
4 . 某农场要建一个长方形的养鸡场,鸡场的一边靠着长为25米的墙,另外三边用木栏围成,木栏长40米.
(1)求养鸡场的最大面积;
(2)养鸡场的面积能达到220平方米吗?如果能,请说明设计方案,如果不能请说明理由.
(1)求养鸡场的最大面积;
(2)养鸡场的面积能达到220平方米吗?如果能,请说明设计方案,如果不能请说明理由.
您最近一年使用:0次
名校
5 . 如图,利用一面墙(墙的长度不超过
),用
长的篱笆围一个矩形场地,若设矩形场地面积为
,
的长度为
.
(1)求出S与x之间的解析式,其中x的取值范围是什么?
(2)当
和
分别为多少米时,矩形的面积最大,最大面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1611d15c7e1e4ab4a4a61537b3989d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ec72d07385ed62ec9540083958be2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa2d65026770c5505f8adeb450e43b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3bde6ef2ee5b749b4d48d706543cdb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/2/0ce25b2b-7042-4202-88a3-98084989a169.png?resizew=172)
(1)求出S与x之间的解析式,其中x的取值范围是什么?
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
2023-06-30更新
|
216次组卷
|
6卷引用:广东省肇庆市端州区颂德学校2022-2023学年九年级上学期期中数学试题
6 . 为了有效预防和控制疫情,及时监测疫情发展态势,实施定期核酸检测.某社区准备搭建一个动态核酸检测点,现有33米可移动的隔离带,围成如图的临时检测点,这是一个一面靠墙(墙面为
)的矩形,内部分成两个区,
区为登记区,
区为检测区,入口通道在
边上,两区通道在
边上,出口通道在
边上,通道宽均为1米.设
,矩形
的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/fab130fc-cbdf-4593-9dc1-5ce3402715a8.png?resizew=263)
(1)
可表示为________;
(2)当
为何值时,
有最大值?最大值是多少?
(3)所围成矩形
的面积能否达到96平方米?如果能,求出
的长;如果不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7a3d679b4dae63575903387a76ce45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/fab130fc-cbdf-4593-9dc1-5ce3402715a8.png?resizew=263)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
(3)所围成矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
23-24九年级上·湖北省直辖县级单位·期末
7 . 如图,抛物线
与
轴交于
两点,与
轴交于点
,直线
经过点
,点
是直线
上的动点,过点
作
轴,垂足为
,交抛物线于点
.
![](https://img.xkw.com/dksih/QBM/2023/2/2/3166046071742464/3167590185598976/STEM/02f8bf869c0b4ef18142b00eb36d3e25.png?resizew=296)
(1)求抛物线的解析式及点
的坐标;
(2)当点
位于直线
上方且
面积最大时,求
的坐标;
(3)将
点向右平移
个单位长度得到点
,当线段
与抛物线只有一个交点时,请直接写出
点横坐标
的取值范围_______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bdfa844c7e04ace8f824edee11be380.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/fd4fb4dfa07106b78767640e9c49d36f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0520e9675bc1b416e8b8f01eb69fd13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/675e5e245e13ce0658233bed7a7872e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2023/2/2/3166046071742464/3167590185598976/STEM/02f8bf869c0b4ef18142b00eb36d3e25.png?resizew=296)
(1)求抛物线的解析式及点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
8 . 如图,嘉嘉欲借助院子里的一面长
的墙,想用长为
的网绳围成一个矩形
给奶奶养鸡,怎样使矩形
的面积最大呢?同学淇淇帮她解决了这个问题.淇淇的思路是:设
的边长为
,矩形
的面积为
,不考虑其他因素,请帮他们回答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/9865b815-b258-41f9-ad8f-6feedde0d2cc.png?resizew=108)
(1)求S与x的函数关系式,直接写出x的取值范围;
(2)x为何值时,矩形
的面积最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b749f9acb5f0de709a1709bbdd42614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c758c27bec97c234d1d818c40f3d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/cc3bde6ef2ee5b749b4d48d706543cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa2d65026770c5505f8adeb450e43b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/9865b815-b258-41f9-ad8f-6feedde0d2cc.png?resizew=108)
(1)求S与x的函数关系式,直接写出x的取值范围;
(2)x为何值时,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2023-02-01更新
|
286次组卷
|
3卷引用:河北省部分学校联考2022-2023学年九年级上学期期末数学素质调研卷
河北省部分学校联考2022-2023学年九年级上学期期末数学素质调研卷(已下线)第10讲 实际问题与二次函数-【暑假自学课】2023年新九年级数学暑假精品课(人教版)云南省曲靖市麒麟区第一中学2022-2023学年九年级下学期第三次月考数学试题
9 . 如图,抛物线
,直线
与抛物线、
轴分别相交于
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/bc40cc5a-9cd6-4773-9a4a-14490128e0a0.png?resizew=193)
(1)当
时,求
点的坐标;
(2)当
两点重合时,求
的值;
(3)当
点最高时
,求抛物线的解析式;
(4)在抛物线
与
轴所围成的封闭图形的边界上,我们把横坐标是整数的点称为“可点”,直接写出
时,“可点”的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345adb51c49dcdd3cc1b9a3d6075ad2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886113560c2f5981423e76f04f901882.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/bc40cc5a-9cd6-4773-9a4a-14490128e0a0.png?resizew=193)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66884efff7400f92b530d69d029778d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85b9f5f2c0bc392cd7b867727d7fbad.png)
(4)在抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d59a91eb106fe04d482899ab5e45e4b.png)
您最近一年使用:0次
10 . 如图,已知锐角
中,边
为12,高
长为8,矩形
的边
在
边上,其余两个顶点E,F分别在
,
边上,
交
于点K.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/98c150ee-43e2-456f-bda9-bd7aad81ab9e.png?resizew=198)
(1)求的
的值;
(2)设
,矩形
的面积为S,求S与x的函数关系式,并求S的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/98c150ee-43e2-456f-bda9-bd7aad81ab9e.png?resizew=198)
(1)求的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f00076da0fc0c1700589187efac99c24.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f45321df06ac830383be37e07e3be533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
您最近一年使用:0次