1 . 如图,抛物线
与x轴交于A、B两点,与y轴交于点C,
,顶点为D.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/34e6139e-0dd0-41b0-b289-51e277aac8b2.png?resizew=384)
(1)求此函数的关系式;
(2)在
下方的抛物线上有一点N,过点N作直线
轴,交
于点M,当点N坐标为多少时,线段
的长度最大?最大是多少?
(3)在对称轴上有一点K,在抛物线上有一点L,若使A,B,K,L为顶点形成平行四边形,求出K,L点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8afcd896c25f11b18ea574b37b60d6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/34e6139e-0dd0-41b0-b289-51e277aac8b2.png?resizew=384)
(1)求此函数的关系式;
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25795c2dc456965454bdc16fd9c06e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)在对称轴上有一点K,在抛物线上有一点L,若使A,B,K,L为顶点形成平行四边形,求出K,L点的坐标.
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2 . 用一段长度为
的篱笆围成一个矩形菜地,能围成菜地的面积不可能是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74dee2e8849924124cbb31f9c6f15479.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 如图,抛物线
与
轴交于点
,与
轴交于点
,在
轴上有一动点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a7b99f05b28d16533035bb84e2da1a9.png)
,过点
作
轴的垂线交直线
于点
,交抛物线于点
,过点
作
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/e91433bf-87ea-4ac7-99ed-aafd8d18c587.png?resizew=246)
(1)求
的值和直线
的函数表达式;
(2)设
的周长为
,
的周长为
,若
,求
的值.
(3)如图2,
为抛物线
上一点,过
点作一直线交抛物线于点
,直线
与
轴分别交于点
,
,直接写出
与
之间的关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a4848852117227bc1ad637e94f41f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9054bc93e36508f5896c07cd68534216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a7b99f05b28d16533035bb84e2da1a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095be252024171b27a86240042f6e70e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ededa0e19291b5b7eb9884af5bdeb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/e91433bf-87ea-4ac7-99ed-aafd8d18c587.png?resizew=246)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654a3aacb8539b4996023caf5b55c85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ddb8c4182b3e29b2c6512f355f364fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3393a7cc29119a80dc28844bea661b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbd31f6ff17ca9dbe0ad498d3c5e28d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccae78be47a601f7bb2bc4f5240ff63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ad58997b9dc0b341c9af08f0cd1fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9272e29b54f6c317e8f18c6a5db75ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abdd3276a2d0e9135d0e34c7a56c13f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c61746fa1742232d294cd1e379ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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名校
4 . 为加强学生的素质教育,让学生看到自己的劳动成果,某中学围建了一个如图所示的矩形苗圃园让学生种菜,苗圃园其中一边靠墙,可利用的墙长不超过16
,另外三边由36
长的栅栏围成,设矩形
空地中,垂直于墙的边
,面积为
(如图).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/c0292c7b-f47d-4327-9e08-ea24ebebcf2d.jpg?resizew=107)
(1)求
与
之间的函数关系式,并写出自变量
的取值范围;
(2)当
为何值时,
有最大值?最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69914eb47c154c256dae0457a4a9ba8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc99bfe039bd21c6729def8b1443b04.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/c0292c7b-f47d-4327-9e08-ea24ebebcf2d.jpg?resizew=107)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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5 . 【背景信息】为了保持室内空气的清新,某仓库的换气窗采用了以下设计:
如图1,窗子的形状是一个五边形,它可看作是由一个矩形
和一个
组成,该窗子关闭时可以完全密封,根据室内的温度和湿度也可以白动打开窗子上的通风口换气,通风口为
(阴影部分均不通风),点F为
的中点,
是可以沿窗户边框上下滑动且始终保持和
平行的伸缩横杆.
设窗子的边框
、
分别为
、
,窗子的高度(即点E到
的距离)为
.
【初步探究】
(1)若
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae96cd3fcb18e7ba8919bdf4aef510a6.png)
①
与
之间的距离为
,求此时
的面积;
②
与
之间的距离为
,试将通风口的面积
表示成关于
的函数;
【拓展提升】
(2)若金属杆
移动到高于
所在位置的某一处时,通风口面积达到最大值,h需要满足的条件是 ,通风口的最大面积是
(用含a,b,h的代数式表示).
如图1,窗子的形状是一个五边形,它可看作是由一个矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb02e157819a2bdd0f2790cbc825e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
设窗子的边框
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649246df150efd9ab67f444574411a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75dcc12aa278db5bf3da96b11cc9db51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9176a2e9cc39d57c54a12b396e71815.png)
【初步探究】
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae96cd3fcb18e7ba8919bdf4aef510a6.png)
①
![](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/1f328ba89c0a92a4447788b65571f7aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb02e157819a2bdd0f2790cbc825e9.png)
②
![](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/cc3bde6ef2ee5b749b4d48d706543cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9071b6ff1545fa324ebf0fed0a3026e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f193416fbd3c6270c178009aaa27c255.png)
【拓展提升】
(2)若金属杆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba007666deb89951641bd1e24bc174a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/e7ccb043-979c-45a0-9bb9-3cc80acad819.png?resizew=402)
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6 . 在美化校园的活动中,某兴趣小组借助如图所示的直角墙角(墙角两边
和
足够长),用
长的篱笆刚好围成一个矩形花园
(篱笆只围
和
两边).设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/bd08e7ef-e526-41b0-8f2b-931b6019b47b.jpg?resizew=183)
(1)求y与x之间的关系式,并写出自变量的取值范围;
(2)当矩形花园的面积为
时,求
的长;
(3)如果在点P处有一棵树(不考虑粗细),它与墙
和
的距离分别是
和
,如果要将这棵树围在矩形花园内部(含边界,即
,
),当
__________
,矩形花园面积最大,最大值是__________
.(直接写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2fc57da7f8399eae9ad9ad22ca836.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ac400e3f5ba8b945bbef83db8611b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a2f3d57e6e949964ca7a4085ca760a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/bd08e7ef-e526-41b0-8f2b-931b6019b47b.jpg?resizew=183)
(1)求y与x之间的关系式,并写出自变量的取值范围;
(2)当矩形花园的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6307c0249ba768c1c0c9a253c31720d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)如果在点P处有一棵树(不考虑粗细),它与墙
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b749f9acb5f0de709a1709bbdd42614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e17ee14bd91bfff409c06fd434f6745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95d0ebed56b9f99f57b0c36711ae865e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a75b731442c637e41150abb852b359e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
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7 . 为改善小区环境,某小区决定要在一块一边靠墙(墙长
)的空地上修建一个矩形绿化带
,绿化带一边靠墙,另三边用总长为
的栅栏围住,如图所示.若设绿化带的
边长为
,绿化带的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/b8ac9d75-f765-4cad-9ef3-02f6a6368cbe.png?resizew=181)
(1)求y与x之间的函数解析式,并直接写出自变量x的取值范围;
(2)当x为何值时,满足条件的绿化带面积最大,最大面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e14f7bf7db7859f44cbc090c81a9972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d20eb158ac67a0cedf758c27e064373.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c2b70e3270ca69a01d442ec0840ed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc99bfe039bd21c6729def8b1443b04.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/b8ac9d75-f765-4cad-9ef3-02f6a6368cbe.png?resizew=181)
(1)求y与x之间的函数解析式,并直接写出自变量x的取值范围;
(2)当x为何值时,满足条件的绿化带面积最大,最大面积是多少?
您最近一年使用:0次
8 . 用
的绳子围成一个的矩形,则矩形面积
与一边长为
之间的函数关系式为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b28de0b351c0bdd6033b57ba930a045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740004cfdade4c185f722dadc27e15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-01-19更新
|
79次组卷
|
2卷引用:河北省唐山市遵化市2023-2024学年九年级上学期期末数学试题
9 . 如图,正方形
的顶点A、B与正方形
的顶点G,H同在一段抛物线上,且抛物线的顶点落在
与y轴的交点上,两正方形的边
与
同时落在x轴上.若正方形
的边长为4,则正方形
的边长为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-01-19更新
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84次组卷
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2卷引用:广东省潮州市2023-2024学年九年级上学期期末数学试题
10 . 国家课程实施以来,学校特别重视学生劳动教育,为了提高学生动手能力,特意给学生划出实践基地用来给各班种植花草、花生、马铃薯等.实验小组同学决定用长为
的栅栏,再借助学校的外墙围成一个矩形的花圃
(如图).已知可利用的外墙长
,设矩形
的边
,面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/259c7b61-94b3-4d64-914b-84eebc87c3ed.png?resizew=181)
(1)
与
之间的函数关系式为_______,
的取值范围是_______;
(2)用配方法求当
分别为多少
时,花圃的面积最大?最大面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f631cfdf4666db95beb923072ced8d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/66ac400e3f5ba8b945bbef83db8611b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa2d65026770c5505f8adeb450e43b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/259c7b61-94b3-4d64-914b-84eebc87c3ed.png?resizew=181)
(1)
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)用配方法求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
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