1 . 已知矩形周长24cm,矩形绕它的一边旋转形成一个圆柱,矩形之长、宽各为多少时,旋转形成的圆柱侧面积最大?最大的侧面积是多少?
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2023-09-18更新
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91次组卷
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2卷引用:湖北省武汉二中广雅学校2023-2024学年九年级上学期月考数学试题
2 . 四边形
的对角线
,且
,则四边形
的面积( )
![](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/aed9d72c0c6d207f6051b4df6ca410c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.有最大值64 | B.有最小值64 | C.有最大值32 | D.有最小值32 |
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3 . 如图,抛物线
经过原点,与
轴交于另一点
,点
在此抛物线上,连接
,作
,交抛物线于点
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869fac5945102689b049ab5c3c366b8e.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/c17c7608edaf9a0fa498674d5c729ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15891bbd7c67566e96a78da95cde0f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/aaf77f63-d1e2-4f0a-8bbd-8602428d934c.png?resizew=189)
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名校
4 . 某幼儿园有一道长为16米的墙,计划用32米长的围栏利用一面墙如图围成一个矩形草坪
.
(1)当矩形草坪面积为120平方米时候,求该矩形草坪
边的长.
(2)怎样围能得到面积最大的草坪?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/27/cbb02b0a-bb53-4ea3-b7c7-b5ec1b537041.png?resizew=179)
(1)当矩形草坪面积为120平方米时候,求该矩形草坪
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)怎样围能得到面积最大的草坪?
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5 . 如图,用一段长为
的篱笆围成一个一边靠墙的矩形场地,若墙的最大可利用长度为
,当这块矩形场地的面积最大时,平行于墙的一边长为_________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab5f059b8406993a0d17271b1cb3905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f751f4679c27bc2b4c1e0e56d7f91708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/253845af-6846-41f5-bdd2-ddda124894ca.png?resizew=225)
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2023-08-28更新
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252次组卷
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4卷引用:2023年湖北省襄阳市东津新区中考模拟数学试题
2023年湖北省襄阳市东津新区中考模拟数学试题黑龙江省大庆市景园中学2023-2024学年九年级上学期月考数学试题(已下线)22.2+二次函数与实际问题(题型精讲精练)1(原卷版)云南省昆明市盘龙区昆明市第二十一中学2023-2024学年九年级上学期期中数学试题
名校
6 . 如图1,抛物线
的顶点坐标为
,与
轴交于点
,
两点,与
轴交于点
,点
是抛物线上的动点.
(2)如图2,连接
,点
在
上,若点
在第一象限,且
,求线段
长度的最大值;
(3)如图3,连接
、
,已知
,是否存在点
,使得
?若存在,求出点
的横坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1dab74e16403e8131f9f5b2a74f3a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e30645f36e8628b9e25d53598d5174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/dad2a36927223bd70f426ba06aea4b45.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a39aaa0e741ede13602245af3db79791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
(3)如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e16fd62024bc35b3e659f5309f55b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a7de5b70003502e40b95b3b7d3d933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2023-08-06更新
|
106次组卷
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2卷引用:2023年湖北省武汉市洪山区中考模拟数学试题(二)
7 . 为了增加校园绿化,学校计划建造一块边长为
的正方形花坛种植“两花一草”,如图,取四边中点,构成正方形
(甲区域),在四个角落构造4个全等的矩形(已区域),甲、乙两区域种植不同花卉,剩余区域种植草坪.
,乙区域建造费用为80元/
,草坪建造费用为10元/
,设每个矩形的面积为
,建造总费用为y元,求y关于x的函数关系式;
(2)当建造总费用为74880元时,矩形区城的长和宽分别为多少米?
(3)甲区域建造费用调整为40元/
,乙区域建造费用调整为a元/
(a为10的倍数),草坪建造单价不变,最后建造总费用为55000元,求a的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c758c27bec97c234d1d818c40f3d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba007666deb89951641bd1e24bc174a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba007666deb89951641bd1e24bc174a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba007666deb89951641bd1e24bc174a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11fd7bb26c8ccfd0ec59f988a35747ae.png)
(2)当建造总费用为74880元时,矩形区城的长和宽分别为多少米?
(3)甲区域建造费用调整为40元/
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba007666deb89951641bd1e24bc174a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba007666deb89951641bd1e24bc174a2.png)
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8 . 如图,抛物线
与x轴的交点为A,B两点,与y轴的交于点C,
.
(1)求抛物线的解析式;
(2)P为抛物线在第四象限上的一点,直线
与抛物线的对称轴相交于点M,若
是以
为底边的等腰三角形,求点P的坐标;
(3)P是该抛物线上位于对称轴右侧的动点,Q、N是抛物线对称轴上两点,
. 求证:存在确定的点N,使直线
与抛物线只有唯一交点P.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1768e0c1d2650b638d624b34d1459e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df74a82d52fa9d42780887e48fba8d08.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/8/97e03fa8-a542-4db5-9e43-e22ef6d6f199.png?resizew=304)
(1)求抛物线的解析式;
(2)P为抛物线在第四象限上的一点,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)P是该抛物线上位于对称轴右侧的动点,Q、N是抛物线对称轴上两点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c6ffb06342e15d59c23b52e6ab2cb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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9 . 如图,已知抛物线
的对称轴为直线
,且抛物线经过
,
两点,与
轴交于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/89adb706-36a0-4f98-ace5-534a54bba8c3.png?resizew=126)
(1)求抛物线的解析式;
(2)在抛物线的对称轴直线
上找一点
,使点
到点
的距离与到点
的距离之差最大,求出点
的坐标;
(3)设点
为抛物线的对称轴
上的一个动点,求使
为直角三角形的点
的坐标.(直接写出结果)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c052d7af2f98d95bac8725b608fba0fc.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/2023/12/26/89adb706-36a0-4f98-ace5-534a54bba8c3.png?resizew=126)
(1)求抛物线的解析式;
(2)在抛物线的对称轴直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/ac047e91852b91af639feec23a9598b2.png)
(3)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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10 . 如图,用一段长为60米的篱笆围成一个一边靠墙的矩形
菜园,墙长为
米,设矩形
菜园的面积为
(单位:米
),
的长为
(单位:米)则
关于
的函数关系式是________ ,自变量
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51bd1d2b9900da345b34d743a3ee5676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921ef5abce73648e3834140df9a72aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](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)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/309bc38f-2f2c-4c1c-acf5-02b8549c6908.png?resizew=200)
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