1 . 如图,正方形
的边长是4.E是
边上一点(E不与A、B重合),F是
的延长线上一点,
.四边形
是矩形,其面积
随
的长
的变化而变化且构成函数.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/efab2ff1-d70b-4958-89fa-5c46256cde8b.png?resizew=176)
(1)求
与
之间的函数关系式,并写出自变量
的取值范围;
(2)若上述(1)中是二次函数,请用配方法把它转化成
的形式,并指出当
取何值时,
取得最大(或最小)值,该值是多少?
(3)求出抛物线与
轴的交点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5774f580a6bb0cd5291cd8d14e2af648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a528a9e05c1097f568566ceac619ae9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/efab2ff1-d70b-4958-89fa-5c46256cde8b.png?resizew=176)
(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)若上述(1)中是二次函数,请用配方法把它转化成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcff1114aa1a7d118ccbeec937a55c45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)求出抛物线与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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2 . 在
中,
,
,
,点P 从点A 出发,沿
边向点B以1cm/s 的速度移动,同时点Q从点B出发沿
边向点C以2 cm/s 的速度移动.如果P,Q两点同时出发,分别到达B,C两点后就停止移动.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/b3b4a0d7-fcfc-43d7-9985-9176236c25b1.png?resizew=179)
(1)设运动开始后第
时,四边形
的面积是
,写出S与t的函数关系式,并指出自变量t的取值范围;
(2)t为何值时,S 最小?最小值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b8e1533cf896dc51edc46b182457db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6747441b260ca043446b5d472fece440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c554f35366a59ba4b759f1871826a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/b3b4a0d7-fcfc-43d7-9985-9176236c25b1.png?resizew=179)
(1)设运动开始后第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1a48b92c61d209d0556e4cd8fdb70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5b62ea69808e36e57db3cf2583f118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ecfda698212594a342565257dc5508.png)
(2)t为何值时,S 最小?最小值是多少?
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3 . 劳动是财富的源泉,也是幸福的源泉.某中学对劳动教育进行积极探索和实践,创建学生劳动教育基地,让学生参与到农耕劳作中.如图,现准备利用校园围墙的一段
(
最长可用
),用
长的篱笆,围成一个矩形菜园
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/a15fa4e5-f4fd-468f-a314-28d6c7416f89.png?resizew=235)
(1)当
长度为多少时,矩形菜园的面积为
?
(2)当
长度为多少时,矩形菜园的面积最大?最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146ea9ed5176797da555a70bbe9602c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c758c27bec97c234d1d818c40f3d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/a15fa4e5-f4fd-468f-a314-28d6c7416f89.png?resizew=235)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92057add5c62908986c807400deac166.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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4 . 校艺术节上,甲同学用腰长为
的等腰直角三角形卡纸
裁剪出如图所示的矩形纸片
,且矩形的四个顶点都在
的边上.
(1)若甲裁剪出来的矩形纸片周长是
纸片周长的一半,那么这个矩形纸片的宽
是___________cm;
(2)设
的长度为
,矩形
的面积为
,
①求
关于
的函数解析式;
②求矩形
的面积
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe9f7abf7bcf4e1aa2579cd191d7761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/395bf903-6582-4b69-acd4-02614fbba969.png?resizew=147)
(1)若甲裁剪出来的矩形纸片周长是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d9dd7d02748803df34f18d3a05d0543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921abeb6b0f221c8bd539642e57800fa.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②求矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
名校
5 . 某学校为美化学校环境,打造绿色校园,决定用篱笆围成一个一面靠墙(墙足够长)的矩形花园,用一道篱笆把花园分为A,B两块(如图所示),花园里种满牡丹和芍药,学校已定购篱笆 120 米.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/697faf51-1c54-4c6b-a685-d67276368ec8.png?resizew=183)
(1)设垂直墙的一边为x米,则平行墙的一边为__________米.
(2)要使花园面积最大,求此时x的值并求出其最大面积S.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/697faf51-1c54-4c6b-a685-d67276368ec8.png?resizew=183)
(1)设垂直墙的一边为x米,则平行墙的一边为__________米.
(2)要使花园面积最大,求此时x的值并求出其最大面积S.
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6 . 如图,用一段长为
的篱笆围成一个一边靠墙的矩形花圃
,墙长
.设
长为
,矩形的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/b2dbde51-8616-4464-9931-1d89aa2d9422.png?resizew=216)
(1)写出y与x的函数关系式;
(2)当花圃的面积为
时,
长为多少米?
(3)当
长为多少米时,所围成的花團面积最大?最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9166a6de3f2debeb60a7f297f5fd08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea591f7a39ea1f58f56bf3cb9b0b3b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06d184f66d90d46f4393f24cc2218091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eeecb971e95507741784b35ab2786e4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/b2dbde51-8616-4464-9931-1d89aa2d9422.png?resizew=216)
(1)写出y与x的函数关系式;
(2)当花圃的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6434f3f0062e36128f7d6a55478382a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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7 . 如图1,已知二次函数
的顶点坐标为(1,
),其图象与x轴交于A、B两点,其中点
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/2cc630ca-5618-4d10-bfbb-6a43fefa87b5.png?resizew=329)
(1)求二次函数的解析式;
(2)若点P为线段
上方抛物线上的一点,当点P到线段
的距离最大时,求点P的坐标;
(3)如图2,已知点M为对称轴上一点,点N为抛物线上一点,若以点B、C、M、N为顶点的四边形为平行四边形,求点N的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f2638d71e5d00c241c6704b32094d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0874f019492261eb175bdcc08c189d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d53dc90eda37470f48cd23694bd3075.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/2cc630ca-5618-4d10-bfbb-6a43fefa87b5.png?resizew=329)
(1)求二次函数的解析式;
(2)若点P为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
(3)如图2,已知点M为对称轴上一点,点N为抛物线上一点,若以点B、C、M、N为顶点的四边形为平行四边形,求点N的坐标.
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名校
8 . 如图1.已知等腰直角三角形
的直角边长与正方形
的边长均为
,
与
在同一条直线上,开始时点
与点
重合,让
向右移动,最后点
与点
重合,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/24768989-45ea-42a0-b1ea-2a25feffd8c5.png?resizew=385)
(1)写出两图形重叠部分的面积
与线段
的长度
之间的函数关系式;并写出自变量
的取值范围;
(2)请在如图2所示的坐标系中画出此函数的图象,并结合图象指出重叠部分面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/24768989-45ea-42a0-b1ea-2a25feffd8c5.png?resizew=385)
(1)写出两图形重叠部分的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc2a4e63b6c16037d8c2dde9ecec5aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be6e964c405a9cdf6623f9219898fd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)请在如图2所示的坐标系中画出此函数的图象,并结合图象指出重叠部分面积的最大值.
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9 . 如图菱形
的边长为
,,
,动点P,Q同时从点A出发,都以
的速度分别沿
和
的路经向点C运动,设运动时间为x(单位:s),四边形
的面积为y(单位:
),则y与x
之间的函数关系可用图象表示为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/115684d5-ba58-401b-a9f9-18ef9bef1ae8.jpg?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4bf2ed4e49655ce765ba6ffbb6c7d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd66776565f049eb453c14fcaf79234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3087da5c11909dab613378fee8d471fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f60ce11afb2f34f259546fa4eaa9801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e31351d7b971bda5c97c662fc71103a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/865d6b1dcc625c2cc39336fcd900e917.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/115684d5-ba58-401b-a9f9-18ef9bef1ae8.jpg?resizew=145)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-01-01更新
|
290次组卷
|
2卷引用:2023年广东省东莞市凤岗镇中考一模数学试题
10 . 如图,二次函数
图象的对称轴为直线
,图象过点A、B、C,B点的坐标为
,点M为抛物线上的一个动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/3cde4c27-29fd-4a6b-b8ad-650f704baf53.png?resizew=117)
(1)求二次函数的表达式;
(2)当点M位于x轴下方的抛物线上时,过点M作x轴的垂线,交
于点Q,求线段
的最大值.
(3)在(2)的条件下,当点M位于x轴下方的抛物线上时,求
的最大面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb13bbc5335efc427f9c619a51dae3c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/3cde4c27-29fd-4a6b-b8ad-650f704baf53.png?resizew=117)
(1)求二次函数的表达式;
(2)当点M位于x轴下方的抛物线上时,过点M作x轴的垂线,交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
(3)在(2)的条件下,当点M位于x轴下方的抛物线上时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8045b729b7f257861057191a8a2388.png)
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