1 . 如图,抛物线
与x轴交于A,B两点,与y轴交于点
,连接
.点P为抛物线上位于第一象限内的一个动点,
交y轴于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/4220e181-f4d1-41be-aa3b-5cd39c695e2c.png?resizew=163)
(1)求k的值;
(2)当
为等腰三角形时,求点D的坐标;
(3)连接
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b41758098cff7838cb12900a91803b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7641baffd700f0c577d001e9d7a6c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/4220e181-f4d1-41be-aa3b-5cd39c695e2c.png?resizew=163)
(1)求k的值;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d841a0b27c6b6bb83b6990058f125cf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7f9f7952c4be18cb73393047c2ad75.png)
您最近一年使用:0次
2024-03-02更新
|
183次组卷
|
2卷引用:山东省枣庄市山亭区2023-2024学年九年级上学期期末数学试题
2 . 如图,抛物线
与
轴交于点
和点
,与
轴交于点
,连接
,点
在抛物线上.
(2)如图1,点D在第一象限内的抛物线上,连接
,
,请求出
面积的最大值;
(3)点
在抛物线上移动,连接
,存在
,请直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7291b3d921f595f28960abcdce6dfbed.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)如图1,点D在第一象限内的抛物线上,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b775fcad81420033d6cd594eab772ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
您最近一年使用:0次
2024-03-01更新
|
444次组卷
|
7卷引用:山东省济南市章丘区2023-2024学年九年级上学期期末数学试题
3 . 小林同学是一名羽毛球运动爱好者,下面是他对击球线路的分析.如图,在平面直角坐标系中,点A,C在x轴上,球网AB与y轴的水平距离
,
,
米,击球点P在y轴上.若选择扣球,羽毛球的飞行高度
与水平距离
近似满足一次函数关系
;若选择吊球,羽毛球的飞行高度
与水平距离
近似满足二次函数关系,此时当羽毛球飞行的水平距离是1米时,达到最大高度3.2米.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/36a938ef-ba09-4b96-8c96-2cd2e0a294b2.png?resizew=209)
(1)求吊球时羽毛球满足的二次函数的表达式;
(2)请通过计算说明两种击球方式是否过网;
(3)要使球的落地点到C点的距离更近,请通过计算判断应该选择哪种击球方式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff190bf65903fe49f14fada8be4a44a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b30cd1f082d6f0a19b2df5b6566fdbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d700f3eabe92ebe03b2359db9709bbed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc424d6d0c8dbd9de1f829e674a4244f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ffd001ed78d9a6617d6a17afb25c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e8501acb1cab1cd49cee63595298d79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c3f03c8ba3fede79995fd1e69d7f40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ffd001ed78d9a6617d6a17afb25c1c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/36a938ef-ba09-4b96-8c96-2cd2e0a294b2.png?resizew=209)
(1)求吊球时羽毛球满足的二次函数的表达式;
(2)请通过计算说明两种击球方式是否过网;
(3)要使球的落地点到C点的距离更近,请通过计算判断应该选择哪种击球方式.
您最近一年使用:0次
4 . 如图1,已知二次函数
的图象与
轴交于点
和点
,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/d4713185-ce6c-43e8-ad0e-3ec1e4e59810.png?resizew=315)
图1图2
(1)求这个二次函数的表达式;
(2)若点
为二次函数图象上的一点,当
时,求点
的坐标;
(3)如图2,将直线
向下平移,与二次函数的图象相交于M,N两点,直线
相交于点
,求点
的横坐标(直接写出答案).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586d6b7a54a256cb0ecd0ea2d8262f6d.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/51b5288ad85ce1ff24d0b4053a4869ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/d4713185-ce6c-43e8-ad0e-3ec1e4e59810.png?resizew=315)
图1图2
(1)求这个二次函数的表达式;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c899276bb7c0845a2a574cf6e42bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图2,将直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65db9c631e764b55ed83f953f911bf6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
5 . 如图,已知抛物线
与
轴交于点
和点
,与
轴交于点
.
(1)求抛物线的表达式;
(2)如图1,对称轴上是否存在点
,使
周长最小,求出此时点
的坐标和周长最小值;
(3)如图2,点
为第二象限抛物线上一动点连接
交
于点
,
,是否存在点
,使
取最大值,如果存在求出此时点
的坐标和最值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c119eba6bc8434123efc698b0d5930b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8950c7bc835103d52ceffab14b6b31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c34f23f45d511636fb46dc31913103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/9d654059-9a61-469d-b803-b29816abe4d5.png?resizew=273)
(1)求抛物线的表达式;
(2)如图1,对称轴上是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96bdfe97c9c6261016534c7a6799af3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
6 . 如图,抛物线
的图像与
轴交于点
,点
,与
轴交于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/c1e59624-f521-4b95-8f0c-144619790bae.png?resizew=363)
(1)求这个二次函数的解析式,并求出顶点
的坐标;
(2)若点
为第一象限内抛物线上一点,求
点坐标为多少时,
的面积最大,并求出这个最大面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f2d5055e0b21f4c1aeb25e423c7098.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/c1e59624-f521-4b95-8f0c-144619790bae.png?resizew=363)
(1)求这个二次函数的解析式,并求出顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)若点
![](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/f955e5cc9f108de6f3ca01e5eb84c52e.png)
您最近一年使用:0次
7 . 某数学兴趣小组进行项目式学习成果的展示,给出如下信息:在学校的巨幅宣传墙上,勤于动脑的小丽发现两条熟悉的抛物线,她依据环境,建立如图所示的平面直角坐标系:利用手边的工具,她不仅与同学合作进行力所能及的测量;还看到抛物线
上的两点
,
组成的线段恰好与学校的一处露台等高,于是通过采访总务处老师获得重要数据:他们发现:抛物线
的顶点
纵坐标为
,
与
轴相交于点
,
.抛物线
刚好过
的顶点
,且与
轴相交于点
,平行于
轴的线段
长为
.根据以上信息请你解决如下问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/83a53b4c-02a6-4ec6-aa28-003190911b0d.png?resizew=198)
(1)求两条抛物线
与
的函数关系式;
(2)当
时,求抛物线
与
的最大间距.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.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/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc032171884de00fe8b2128dcafd196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866da1d2ff7849bef370316a0cdac0e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9b8a8021853a63be780dfb7cb39324.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2c7e2b08dbb6b1d14bbcc5bd4cee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f179a5e46197a7f5f5646fefd47c1989.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/83a53b4c-02a6-4ec6-aa28-003190911b0d.png?resizew=198)
(1)求两条抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd48840535e4a16382dfeab35ec75950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
您最近一年使用:0次
8 . 如图,抛物线
与x轴交于
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/26d8830b-a402-4422-931f-2411d3978501.png?resizew=216)
(1)求该抛物线的表达式;
(2)在直线
上方的抛物线上是否存在点P,使得
面积最大,若存在,请求出点P的坐标及面积最大值;若不存在,请说明理由;
(3)Q在抛物线对称轴上,请直接写出当
为直角三角形时,点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad97284da351a44c36c11d5cec429a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf69f85d01dfb0edfe11420d9f87978.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/26d8830b-a402-4422-931f-2411d3978501.png?resizew=216)
(1)求该抛物线的表达式;
(2)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
(3)Q在抛物线对称轴上,请直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe51b50eca45db5d8ca5f4949c56d137.png)
您最近一年使用:0次
9 . 《综合与实践》拱桥形状设计.拱桥是桥梁家族中的重要一员。拱桥跨度大,造型优美灵活,可雄伟壮观,可小巧玲珑。拱桥按桥拱的形状可分为圆弧拱挢、抛物线拱桥和悬链线拱桥,
有一座抛物线型拱桥,在正常水位时水面宽
,当水位上升3m时,水面宽
.按如图所示建立平面直角坐标系,
(1)求此抛物线的函数表达式;
(2)有一条船以
的速度向此桥径直驶来,当船距离此桥
时,桥下水位正好在AB处,之后水位每小时上涨
,为保证安全,当水位达到距拱桥最高点
时,将禁止船只通行.如果该船的速度不变,那么它能否安全通过此桥?
有一座抛物线型拱桥,在正常水位时水面宽
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe5ad8e993ca72050247b58ebe1d5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b05dc55968485eed518b416f112c493.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/d2a00aa5-574e-4b9d-810b-e22aafe352aa.png?resizew=296)
(1)求此抛物线的函数表达式;
(2)有一条船以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059de96a97ddd14e2897fd586f978c6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352fc5eec3eeec139796bf64ce60d545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b8b26f0eb807c4f2a6a4de36145f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71a41641aa0d0e45a3c03d3d2c1196b.png)
您最近一年使用:0次
10 . 二次函数
的图象与
轴交于
两点,与
轴交于点
,点
的坐标为
,点
坐标为
.
(1)求二次函数的表达式;
(2)若当
随x增大而减小,则
取值范围为______;
(3)当
时,二次函数
的最大值为3,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0e705301752424a492f6277ed7774e.png)
(1)求二次函数的表达式;
(2)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6dba543053cca44b35f440419327fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32dafa09346e8a6af1e994b8f2d6212b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次