1 . 某学校准备修建一个面积为y平方米的矩形花圃,它的长比宽多10米,设花圃的宽为x米,则可列函数为_________________ ,化为一般形式为____________ .
您最近一年使用:0次
名校
2 . 综合与探究
如图,在平面直角坐标系中,二次函数
的图象交x轴于A,B两点,交y轴于点C,点A的坐标为
,点B的坐标为
,以
,
为边作矩形
,且边
交二次函数的图象于点M.
(1)求二次函数的表达式.
(2)现有一条垂直于x轴的直线
在A,O两点间(不包括A,O两点)左右移动,分别交x轴于点E,交
于点F,交
于点P,交二次函数的图象于点Q,请用含a的代数式表示
的长.
(3)在(2)的条件下,连接
,则在
上方的二次函数的图象上是否存在这样的点Q,使得以Q,C,F为顶点的三角形和
相似?若存在,直接写出
的值;若不存在,请说明理由.
如图,在平面直角坐标系中,二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cb4b40809912acdd8cb10d14de171df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d439e428bc3bf8778c274dd683f4fde9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/dd4fc868-740e-498f-bded-bc6f277521d0.png?resizew=218)
(1)求二次函数的表达式.
(2)现有一条垂直于x轴的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b53b86bd516400d6fa7dabb3603f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f6927cc2a930203ac34366383e76ef.png)
(3)在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350e954f629c1901a5cec03558319e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099dd87a526391f830ac2a11e7d7ad56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
3 . 综合与探究
如图,抛物线
与x轴交于
和
两点,与y轴交于点C,连接AC,BC.
(1)求抛物线的函数表达式;
(2)设点D在第一象限,且
,求点D的坐标;
(3)点A绕抛物线的对称轴
上一点P顺时针旋转90°恰好与点C重合,将
沿x轴平移得到
,点A,C,P的对应点分别为点
,
,
.在抛物线上是否存在点E,使得以
,
,
,E为顶点的四边形是平行四边形?若存在,直接写出点E的坐标;若不存在,请说明理由.
如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/764f00ce-5754-45b2-85e6-67e5991c5b59.png?resizew=223)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/85865e2e-9e46-44f3-94f8-2715f0c7c7f6.png?resizew=221)
(1)求抛物线的函数表达式;
(2)设点D在第一象限,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd163f68d8f70cba6189b843563e99bb.png)
(3)点A绕抛物线的对称轴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83741d190aae36bdb8e3d2965b4dc6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
您最近一年使用:0次
4 . 太原的五月是月季的狂欢,滨河路上月季花扮靓道路两侧,形成了“绿染龙城,花满并州”的景观效果.市林业局将如图所示的一块长80米,宽40米的矩形空地分成五块小矩形区域,建成月季花种植基地.一块正方形区域为育苗区,一块矩形区域为存储区,其它区域分别种植风花月季,藤本月季和树桩月季.已知存储区的一边与育苗区的宽相等,另一边长为20米,风花月季、藤本月季和树桩月季每年每平方米的产值分别为200元、300元和400元.
(1)如果风花月季与藤本月季每年的产值相等,求育苗区的边长;
(2)如果风花月季种植面积与育苗区面积的差不超过2120平方米,求这三种月季花每年总产值的最大值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/e228f3ea-e248-4c46-b141-236796e9aa32.png?resizew=163)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/6c7e3af4-6525-4a6c-b4f2-3ced9a7d755e.png?resizew=226)
(1)如果风花月季与藤本月季每年的产值相等,求育苗区的边长;
(2)如果风花月季种植面积与育苗区面积的差不超过2120平方米,求这三种月季花每年总产值的最大值.
您最近一年使用:0次
5 . 用一根长为
的铁丝围成一个面积为
的矩形,小亮说:“a的值可能是
,小情说:“a的值可能是
”,小强说:“a的值可能是
”,小英说:“a的值可能是
”,其中说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f748a2fff2648c65b80355004b13bbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b921dd7e6dfda8c2e527af181b5592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90dd550e1ad9bbf01687ffb4aab788ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b685c556cc423e4833c1dc671a134cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba602bfa3a3ffb4fb43dc0f704a7f7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821b8672d030c240ff230a0174aa7a3d.png)
A.小亮 | B.小倩 | C.小强 | D.小英 |
您最近一年使用:0次
6 . 综合与探究
如图,抛物线
与x轴交于
,
两点,与y轴交于点C.现有一宽度为1,长度足够长的矩形(图中阴影部分),矩形的长与y轴平行,将矩形沿x轴方向平移,矩形交抛物线于点M,N(点M在点N的左侧),交直线
于点E,F(点E在点F的左侧),设点M的横坐标为m(
).
(1)求抛物线的函数表达式;
(2)在矩形平移的过程中,如果以点E,F,N,M为顶点的四边形是平行四边形,求出此时m的值;
(3)点P是直线
上一动点,点Q为抛物线顶点,若
,请直接写出点P的坐标.
如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7e43e8f4236c0ec23717e6e7b3eacb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/28/2fefb5eb-78e0-4240-93a9-8051cb177ab2.png?resizew=298)
(1)求抛物线的函数表达式;
(2)在矩形平移的过程中,如果以点E,F,N,M为顶点的四边形是平行四边形,求出此时m的值;
(3)点P是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6749a08e094ad5473478177ad490f971.png)
您最近一年使用:0次
7 . 综合与探究
如图1,抛物线
与
轴交于
,
两点(点
在点
的左侧),与
轴交于点
,点
是直线
下方抛物线上的一个动点,连接
,
.
![](https://img.xkw.com/dksih/QBM/2023/4/28/3226454022225920/3231288227078144/STEM/66228e966a164dbdbbd27e7fabfcc9b7.png?resizew=462)
(1)求点
,
,
的坐标,并直接写出直线
,
的函数表达式.
(2)如图1,过点
作
的平行线分别交
,
轴于点
,
,当点
是
的三等分点时,求点
的坐标.
(3)如图2,连接
,交
于点
,在点
运动的过程中,是否存在
是等腰三角形?若存在,请直接写出点
的坐标;若不存在,请说明理由.
如图1,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca83108c0d244dec95a77e37ea2298f7.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2023/4/28/3226454022225920/3231288227078144/STEM/66228e966a164dbdbbd27e7fabfcc9b7.png?resizew=462)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图1,过点
![](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/60ef95894ceebaf236170e8832dcf7e3.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4139b091e9dc432b267ff68420c77de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
名校
8 . 如图,四边形
中,
,若
,则四边形
的面积最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0197cadb1f3a83195427880fae7cedd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/9847f88d-0a38-4336-8c9c-0a97118cafad.png?resizew=132)
您最近一年使用:0次
2023-02-24更新
|
142次组卷
|
3卷引用:山西省阳泉市郊区2022-2023学年九年级上学期期末教学质量监测数学试题
9 . 综合与探究
如图,抛物线
与x轴交于
,
两点,与y轴交于点C.点
是x轴上的一个动点,过点P作直线
轴,与直线BC交于点M,与抛物线交于点N.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/39983a96-5a83-4dc5-9341-8caaa660dc7a.png?resizew=461)
(1)求这个抛物线的函数表达式.
(2)①若点P在线段OB上运动,求线段MN的最大值;
②若点P在x轴的正半轴上运动,在y轴上是否存在点Q,使以M,N,C,Q为顶点的四边形为菱形?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bfec4efcc9f0e656d6864daaaef55d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/39983a96-5a83-4dc5-9341-8caaa660dc7a.png?resizew=461)
(1)求这个抛物线的函数表达式.
(2)①若点P在线段OB上运动,求线段MN的最大值;
②若点P在x轴的正半轴上运动,在y轴上是否存在点Q,使以M,N,C,Q为顶点的四边形为菱形?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
您最近一年使用:0次
2023-01-09更新
|
313次组卷
|
5卷引用:山西省临汾市壶关县2022-2023学年九年级上学期1月期末数学试题
10 . 如图,因疫情防控需要,某小区在足够大的空地利用旧墙
和隔离带围成一个矩形隔离区
,已知墙长为
米(即
米),
,矩形隔离区的一边靠墙,另三边共用了
米长的隔离带,请你求出矩形隔离区
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31987185092e96fd0c5cb245bd78199e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b26c112faf0e59cb6294f591dcb6155.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/5817b9c3-2898-4de8-8120-af263cf7fa4d.png?resizew=165)
您最近一年使用:0次
2022-12-08更新
|
99次组卷
|
3卷引用:山西省大同市2022-2023学年九年级上学期期中数学试题