2023九年级下·全国·专题练习
1 . 如图,一农户要建一个矩形鸡舍,为了节省材料鸡舍的一边利用长为a米的墙,另外三边用长为27米的建筑材料围成,为方便进出,在垂直墙的一边留下一个宽1米的门.设
米时,鸡舍面积为S平方米.
![](https://img.xkw.com/dksih/QBM/2023/4/27/3225489125244928/3225634694479872/STEM/42459c7689f04424bd6f3c18ad579f32.png?resizew=201)
(1)求S关于x的函数表达式及x的取值范围.
(2)在(1)的条件下,当
为多少时,鸡舍的面积为90平方米?
(3)若住房墙的长度足够长,问鸡舍面积能否达到100平方米?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7a3d679b4dae63575903387a76ce45.png)
![](https://img.xkw.com/dksih/QBM/2023/4/27/3225489125244928/3225634694479872/STEM/42459c7689f04424bd6f3c18ad579f32.png?resizew=201)
(1)求S关于x的函数表达式及x的取值范围.
(2)在(1)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)若住房墙的长度足够长,问鸡舍面积能否达到100平方米?
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4卷引用:第19讲 二次函数的应用-【暑假自学课】2023年新九年级数学暑假精品课(沪教版,上海专用)
(已下线)第19讲 二次函数的应用-【暑假自学课】2023年新九年级数学暑假精品课(沪教版,上海专用)(已下线)专题2.4 二次函数的实际应用-几何问题(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》(北师大版)(已下线)数学(湖南长沙卷)-学易金卷:2023年中考考前押题密卷(含考试版、全解全析、参考答案、答题卡)(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)
2023八年级下·上海·专题练习
2 . 已知:如图1,梯形
中,
,
,
,
,E是直线
上一点,联结
,过点E作
交直线
于点F,联结
,
上一点(与点A、D不重合),(如图1所示)
①求证:
;
②设
,
的面积为y,求y关于x的函数解析式,并写出此函数的定义域;
(2)直线
上是否存在一点E,使
是
面积的3倍,若存在,直接写出
的长,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b173ac8cc4ac4f1c9e1daaa605fbb27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5441d73845911db1993bf903c4d8700f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3a3137299ffaea0545cd45323f1af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2e1083b773e16d1e385072652f7319.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c421ab2dc57f44899efb36549781347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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2023八年级下·上海·专题练习
3 . 已知:如图1,在线段
的同侧作正方形
和正方形
,连接
并延长交
于点M,作
,垂足为N,
交
于P.设正方形
的边长为1.
;
(2)设
,四边形
的面积为y,求y关于x的函数解析式,并写出定义域;
(3)如果按照题设方法作出的四边形
是菱形,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b435d606dacd39314cdf8916dad295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f479d987bc7abd828c64f9dc745836ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba07bfda5b4084af3b80d9bcbd52aac5.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c29bf5a05dd46f6e03dfd22c32f7ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2de259c096e73718672a80e0b2dbcc1.png)
(3)如果按照题设方法作出的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1756591f3a85605761cdaf8ec6cfbe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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4 . 如图,用长为12米的篱笆围成一个矩形花圃,花圃一面靠墙(墙的长度超过12米),设花圃垂直于墙的一边长为x米,花圃面积为y平方米,那么y关于x的函数解析式为 _____ .(不要求写出定义域)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/57775375-84e6-4660-834c-d8e62b08cbbd.png?resizew=145)
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8卷引用:2023年上海市宝山区中考数学一模试卷
2023年上海市宝山区中考数学一模试卷2023年上海市浦东新区中考三模数学试题(5月)(已下线)第17讲 二次函数y=ax2+bx+c的图像-【暑假自学课】2023年新九年级数学暑假精品课(沪教版,上海专用)(已下线)第08讲 二次函数的应用-【暑假自学课】2023年新九年级数学暑假精品课(浙教版)(已下线)第01讲 二次函数的相关概念(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学上册《知识解读·题型专练》(人教版)(已下线)第01讲 二次函数的相关概念(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学上册《知识解读·题型专练》(浙教版)(已下线)第01讲 二次函数的相关概念(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学下册《知识解读·题型专练》(北师大版)(已下线)第01讲 二次函数的相关概念(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学下册《知识解读·题型专练》(苏科版)
5 . 在平面直角坐标系
中,抛物线
经过点
、
,与x轴的负半轴交于点C.
(2)设点D在该抛物线上(位于对称轴右侧部分),连接
.
①如果
与线段
交于点E,且
,求
的正切值;
②如果
与y轴交于点F,以
为半径的
,与以
为半径的
外切,求点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71acf35bb0952c2abba601707d000c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241ce9bd28046ce9b90f43b391132884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27149c9ff20937492950f42084caa019.png)
(2)设点D在该抛物线上(位于对称轴右侧部分),连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
①如果
![](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/11fbc3a1f1e848cf1349b9327be8607d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
②如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c72c070f4f4d2b44927391b59a1e755.png)
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名校
6 . 如图,正方形
的边长为6,动点M沿
的路径移动,过点M作
交正方形的一边于点N,则
的面积y与点M运动的路程x之间形成的函数关系图像大致是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd66776565f049eb453c14fcaf79234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07d7a3d7f32ce2b4baa1f9346dc7e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-04-12更新
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7卷引用:第19讲 二次函数的应用-【暑假自学课】2023年新九年级数学暑假精品课(沪教版,上海专用)
(已下线)第19讲 二次函数的应用-【暑假自学课】2023年新九年级数学暑假精品课(沪教版,上海专用)2023年广东省江门市蓬江区华侨中学中考一模数学试卷2023年广东省清远市阳山县中考一模数学试卷2022年广东省汕头市濠江区中考二模数学试题2023年广东省清远市佛冈县城北中学中考一模数学试题2023年云南省初中学业水平考试中考数学模拟预测题(七)2024年河南省南阳市桐柏县二模数学试题
7 . 如图,在平面直角坐标系
中,已知抛物线
的顶点为P,抛物线与y轴交于点A.
,点
在抛物线上,连接
.
①求顶点P和点B的坐标;
②过抛物线上点D作
轴,垂足为M,
交线段
于点E,如果
,求点D的坐标;
(2)连接
,如果
与x轴负半轴的夹角等于
与
的和,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8922f1dcc4b4aab04a83c7dd0e18bb79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1a65d88f9823d49da8f3b96ea9ec6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1df2d6dedfc510f4c3259925d4ac5994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①求顶点P和点B的坐标;
②过抛物线上点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4914b846a985658a528ab9d70ccc7c30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/733212a09812ee08a2194a2a493b3c9e.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7081dada4c2d7e8b7372637a900dbe21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d398d673f06640f053333c7e3caa269.png)
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8 . 如图,
和
都是等腰直角三角形,
,
,
是
斜边上的中线,点
是射线
上的一点,以
为斜边向左侧作等腰直角
,连接
.
(1)当点
在线段
上(点
与点
、点
不重合),求证:
;
(2)在(1)的条件下,设
,
的面积为y,求y关于
的函数关系式及其定义域;
(3)探究:当点
在射线
上运动时,
是否可以成为等腰三角形?若可以,求出
的长度;若不可以,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f517953a21c2a45fd8465072c44bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de85e94211f2edb591cb4f7be9e26eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2698f08d94afa1cd5b81444791f4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/29/df4f318a-6c82-4f8a-b96f-186930744566.png?resizew=242)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93e193fad261689949a52819753f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39832b5afaf002272e3dec2eeae39b0.png)
(2)在(1)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1dd8809233c90f66563c34f2164415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2698f08d94afa1cd5b81444791f4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)探究:当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926b737b11722b88fd40fc8eef8ecba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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2023-07-26更新
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3卷引用:上海市青浦区青浦平和双语学校2022-2023学年九年级上学期月考数学试题
上海市青浦区青浦平和双语学校2022-2023学年九年级上学期月考数学试题上海外国语大学附属中学2023-2024学年九年级上学期月考数学试题(已下线)清单13 与二次函数相关的10种存在性问题 -2023-2024学年九年级数学上学期期末考点大串讲(苏科版)
9 . 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)
您最近一年使用:0次
10 . 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)
您最近一年使用:0次