1 . 如图,在菱形
中,
,
,矩形
的四个顶点分别在菱形的四边上,则矩形
的最大面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/c1866af6-dfa5-4cae-861a-bf28daf20a7e.png?resizew=182)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cb7a12bb8797615303fc20adb9f988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec780e86f57790cf88ec761e219bf5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/c1866af6-dfa5-4cae-861a-bf28daf20a7e.png?resizew=182)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-05-15更新
|
118次组卷
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2卷引用:鲁教版(五四制)数学九年级上册第三章 二次函数单元检测
2 . 如图,在直角坐标系
中,抛物线
与
轴的正半轴相交于点
,与
轴的正半轴相交于点
,它的对称轴与
轴相交于点
,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/8a412032-e230-46de-96f6-9367b259f858.png?resizew=195)
(1)求此抛物线的表达式;
(2)如果点
在此抛物线上,
,垂足为
,
与线段
相交于点
,且
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d039de5bf810e3ff6b0b6096fa48d462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf77a054bc1e33f151cea26a7cceac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/8a412032-e230-46de-96f6-9367b259f858.png?resizew=195)
(1)求此抛物线的表达式;
(2)如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb73d10046e64d6f36e2dfdc9b9e6145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d02001b7a2644c91435dcda64b981d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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3 . 已知抛物线
的顶点
在直线
上,直线
与
轴的交点为
点.
(1)求点
的坐标与
的值;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd985f8ab48728458c277ab75e84be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/28/1cc402ec-bf39-4710-a10a-526a54a4b066.png?resizew=152)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
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20-21九年级下·全国·课后作业
4 . 相框边的宽可影响放入的相片的大小,如图所示,相框长
,宽
.设相框边的宽为
,相框内的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/ae0feb24-8563-4bc5-b4ad-914b4ea7849c.png?resizew=144)
(1)写出
关于
的函数解析式.
(2)在这个函数解析式中,自变量
的取值范围是什么?
(3)当
取1,1.5,2时分别可以放入多大面积的相片?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8cc740f1c73ccff0db9e7f9b45bbd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a79fa14c8f71cdd5af3ba00ac5824a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740004cfdade4c185f722dadc27e15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/ae0feb24-8563-4bc5-b4ad-914b4ea7849c.png?resizew=144)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)在这个函数解析式中,自变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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2022九年级下·江苏·专题练习
5 . 已知块边长为
的正方形草地.
(1)如图1,先将正方形草地的一条边减少
,再将另一边增加
,设变化后的草地的面积为
,则
(填“是“或“不是”)关于x的函数.
(2)如图2,将正方形草地的相邻两边各增加
,设扩充后的草地的面积为
,
①写出y与x之间的函数关系式,
②当
时,求y的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/97edab1e-43ff-4e62-bca1-1edff1303f93.png?resizew=395)
(1)如图1,先将正方形草地的一条边减少
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025f975ede549e4f1dd5dfffba67ebe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3bde6ef2ee5b749b4d48d706543cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa2d65026770c5505f8adeb450e43b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
(2)如图2,将正方形草地的相邻两边各增加
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3bde6ef2ee5b749b4d48d706543cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a20728e9a9e3018723f2a86f24f332.png)
①写出y与x之间的函数关系式,
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/224d30ca84f1aeeeda7a718e751a4925.png)
您最近一年使用:0次
2023-04-27更新
|
272次组卷
|
5卷引用:专题5.7 二次函数的实际应用-几何面积问题(专项训练)-2022-2023学年九年级数学下册《同步考点解读·专题训练》(苏科版)
(已下线)专题5.7 二次函数的实际应用-几何面积问题(专项训练)-2022-2023学年九年级数学下册《同步考点解读·专题训练》(苏科版)(已下线)专题2.4 二次函数的应用(能力提升)-2022-2023学年九年级数学下册《同步考点解读·专题训练》(北师大版)(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)河南省周口市商水县城关乡第二初级中学2022-2023学年八年级下学期3月月考数学试题十六 实际问题与二次函数(第1课时)
2022九年级下·江苏·专题练习
6 . 如图抛物线
经过点
,点
,且
.
(1)求抛物线的解析式及其对称轴;
(2)点P为抛物线上一点,连接
,直线
把四边形
的面积分为
两部分,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a500407947fa628f1560e48372221ce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2f51e747d15e5db9d4e16ce014c42ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/766baf8fcebfdb1f2603c74074b5392f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5003d37c3c73db46934a59d81f9543dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/fc5897e9-3647-452c-980e-5e9bf7f1f62d.png?resizew=136)
(1)求抛物线的解析式及其对称轴;
(2)点P为抛物线上一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b36e6c9de67225aec4995dc8c853571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfba276b9519667e8dccde6132110f57.png)
您最近一年使用:0次
2022九年级下·江苏·专题练习
7 . 如图,在平面直角坐标系中,抛物线
:
交x轴于A、B两点(点A在点B的左侧),交y轴于点C,一次函数
交抛物线于A,D两点,其中点
.
![](https://img.xkw.com/dksih/QBM/2023/4/26/3224650571849728/3225014430638080/STEM/7f4df1e3c60f483d9a90f3fbf9b38b4a.png?resizew=385)
(1)求抛物线
的解析式;
(2)点G为抛物线上一点,且在线段
上方,过点G作
轴交
于H,交x轴于点N,作
于点M,求
周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7090adf670566a2d7ce5903924d72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f5bbfa563aa2e57914f428129d8586.png)
![](https://img.xkw.com/dksih/QBM/2023/4/26/3224650571849728/3225014430638080/STEM/7f4df1e3c60f483d9a90f3fbf9b38b4a.png?resizew=385)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)点G为抛物线上一点,且在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd0d9a1f2fb81c8e43197631bbc5bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c80514df3157c11d72c960a8bc1c528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb95428cc3a422cea0e72e49fc043d0.png)
您最近一年使用:0次
名校
8 . 如图,抛物线
与抛物线
交于点
,且分别与
轴交于点
,
.过点
作
轴的平行线,分别交两条抛物线于点
,
,则以下结论:①无论
取何值,
恒小于0:②将
向右平移3个单位长度,再向下平移3个单位长度得到
;③当
时,随着
的增大,
的值先增大后减小;④四边形
的面积为18.其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cada4ff35c9d5d0fdec38c74b26257ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbca915307f725499eba9c496b6180c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5c320d78ef38e330176c335cc58e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995367eabde6c2a9edba59d53733ffb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de82aff5049dce8a3d56291dc2ae4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2023-04-24更新
|
369次组卷
|
6卷引用:河北省石家庄市第二十八中学2022-2023学年九年级上学期期末考试数学试题
河北省石家庄市第二十八中学2022-2023学年九年级上学期期末考试数学试题(已下线)数学(济南卷)-学易金卷:2023年中考第一次模拟考试卷(已下线)黄金卷04(德州专用)-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷2023年山东省烟台地区中考一模数学试题2023年湖南省衡阳市第十五中学中考模拟数学试题2024年四川省资阳市雁江区保和中学中考模拟考试数学试题(二)
9 . 如图,有一个铝合金窗框,所使用的铝合金材料长度为
.设
长为
,窗户的总面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/262ffdfd-9e06-431d-8e8f-a0e6e39a0c08.png?resizew=198)
(1)求
关于
的函数表达式;
(2)若
的长不能低于
,且
,求此时窗户总面积
的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74dee2e8849924124cbb31f9c6f15479.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/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba007666deb89951641bd1e24bc174a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/262ffdfd-9e06-431d-8e8f-a0e6e39a0c08.png?resizew=198)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71a41641aa0d0e45a3c03d3d2c1196b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09a9a6f020159406608000cf93d4fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
10 . 用长为
的铁丝,折成一个矩形,设它的一边长为
,面积为
.
(1)求出y与x的函数关系式,并写出取值范围.
(2)当
时,求x的值.
(3)当边长x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/8e476067ee83f0666b74ef0576567c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a606569d1ed164a206be54408b3a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740004cfdade4c185f722dadc27e15.png)
(1)求出y与x的函数关系式,并写出取值范围.
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120abe28fd14169192af542ce0854af2.png)
(3)当边长x为多少时,矩形的面积最大,最大面积是多少?
您最近一年使用:0次
2023-04-06更新
|
79次组卷
|
2卷引用:广东省广州市番禺区南雅学校2022-2023学年九年级上学期9月月考数学试题