1 . 在平面直角坐标系中,抛物线
的图象经过点
和
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/77cfe650-97ce-4a11-8a46-14d249a4b7f8.png?resizew=179)
(1)求抛物线的解析式
(2)①求出当
时,y的最大值和最小值;
②如图,抛物线
与x轴的左侧交点为C,作直线
,D为直线
下方抛物线上一动点,过点D作
于点E,与
交于点F,作
于点M.是否存在点D,使
的周长最大?若存在,请求出点D的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02c9ba8b3b24fe46d1cd632d489ce8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f50a65b9df4c747a41511c4bfa8c2c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/77cfe650-97ce-4a11-8a46-14d249a4b7f8.png?resizew=179)
(1)求抛物线的解析式
(2)①求出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/973be26379d2526d7eb1b92310cf44e2.png)
②如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.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/d1932b7eba41cc74bd9e63fa0558277d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba870ac7e456d8daa098c9d52aeccc2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8eab064d2a2776ae4de074968d507a3.png)
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2 . 已知二次函数
(
是常数,
).
(1)若
,求该函数图象顶点坐标;
(2)若该二次函数图象经过
三个点中的一个点,求该二次函数的表达式;
(3)若
,当
时,
的最大值记为
,最小值记为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd59dfa78438d38619b353b7881c349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e9222ffc26c0e6bfbf252ab5d8a520.png)
(2)若该二次函数图象经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e36c73dac0e23b68d46aa28892b628f0.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1d0169d2809aacb34cf9d70165a3cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ac8ebedafa300c895540c5e5dda755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd59dfa78438d38619b353b7881c349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb29b832f791c1a543a520a767c1094.png)
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2024-04-08更新
|
141次组卷
|
3卷引用:2024年浙江省杭州钱塘区学业水平测试(一)九年级数学模拟试题
名校
3 . 已知抛物线
经过点
.
(1)求a的值;
(2)若抛物线与y轴的公共点为
,抛物线与x轴是否有公共点,若有,求出公共点的坐标;若没有,请说明理由;
(3)当
时,设二次函数
的最大值为M,最小值为N,若
,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab1b8b4c51ae98e609dd716b4e88da6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0d7786659546c0d6a5ebebfd5b3ab6.png)
(1)求a的值;
(2)若抛物线与y轴的公共点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953bfeb398bab2b2ba61b3e6bf0a22e.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9494f8aac293df6806b117ed2b6d2c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab1b8b4c51ae98e609dd716b4e88da6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c1a8158bf9690a3e8b88b72694de2d8.png)
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2024-02-15更新
|
211次组卷
|
2卷引用:云南省昆明市五华区云南大学附属中学2023-2024学年九年级上学期期末数学试题
4 . 如图1,在平面直角坐标系
中,已知抛物线
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/f52dbb18-22c6-4315-a992-ca02dcb3313d.png?resizew=197)
(1)若抛物线过点
,求出抛物线的解析式;
(2)当
时,
的最小值是
,求
时,
的最大值;
(3)已知直线
与抛物线
存在两个交点,若两交点到
轴的距离相等,求
的值;
(4)如图2,作与抛物线
关于
轴对称的抛物线
,当抛物线
与抛物线
围成的封闭区域内(不包括边界)共有11个横、纵坐标均为整数的点时,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86656df7f61c59b2b906f02b06475b94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/f52dbb18-22c6-4315-a992-ca02dcb3313d.png?resizew=197)
(1)若抛物线过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24fbb773104fe20bda3d38eaf87516a0.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6ad6387d592102a743742620eee7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6ad6387d592102a743742620eee7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d2f5543bdddefc82ba4e8b18638a7ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(4)如图2,作与抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81722445de00f3cfcc3cb97e45b0d8dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81722445de00f3cfcc3cb97e45b0d8dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 已知在平面直角坐标系中,直线
经过点
,与y轴交于点B,抛物线
(a,b为常数,
)的对称轴与直线
交点的纵坐标为2.
(1)求抛物线的对称轴;
(2)若该抛物线经过点
这四个点中的两个,求该二次函数的最大值或最小值;
(3)P为线段
上一动点,过点P作平行于x轴的直线,若该直线与抛物线交于点M,N,且点P始终在线段
上,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf061cc5ff07aeeb354194b2208227a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed0acdfb65ea3e9a37f01368eb8bd3bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc93f6d7c8cdd4a67f5e67ec1a3b7e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf061cc5ff07aeeb354194b2208227a.png)
(1)求抛物线的对称轴;
(2)若该抛物线经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46cdb5c76cb9f0be0f439f6191b0830.png)
(3)P为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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6 . 如图,在平面直角坐标系中,已知二次函数
的图象与
轴交于点
和点
两点,与
轴交于点
.点
为线段
上的一动点.
(2)如图1,求
周长的最小值;
(3)如图2,过动点
作
交抛物线第一象限部分于点
,连接
,
,记
与
的面积和为
,当
取得最大值时,求点
的坐标.
![](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/75c561d105fe43b1a25ae26f0b6aac73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6486c10ec324649f8100b63829fbbf3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31c11665576d5ae71a11d8d25d72cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
(2)如图1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70c6ee9b93371d62c2383fa61b13c1f.png)
(3)如图2,过动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e305fa6e419e4187ccecd395c9d05288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9026fbd7897d459b4d559a4b99f2e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8b1307079384bf7accebda3c826ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2024-02-08更新
|
100次组卷
|
2卷引用:安徽省安庆市宿松县2023-2024学年九年级上学期期末数学试题
7 . 在直角坐标系
中,已知点
(
为非零实数),点
与点
关于原点对称,若抛物线
过
三点.
(1)当
时,求抛物线
对应的二次函数解析式;
(2)尝试把
的取值分成两类,使抛物线对应的二次函数分别有关于
的最大、最小值,并写出最大值
和最小值
关于
的函数解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4be55aa3ec35fcc731311809123d53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)尝试把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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8 . 已知点
是二次函数
图象上的点.
(1)求二次函数图象的顶点坐标;
(2)当
时,求函数的最大值与最小值的差.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea717f643cdce1cf106a1d4f9a6297f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629521759a2b679b889b3578ba08bf00.png)
(1)求二次函数图象的顶点坐标;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120b6dab105ef5caf08a9fffeb8d6e55.png)
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9 . 已知二次函数
(a为常数,且
)
(1)若函数图象过点
,求a的值;
(2)当
时,函数的最大值为M,最小值为N,若
,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42ba2cf074d237d460fde82f3f96659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)若函数图象过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f22c4898e2a23e0e888b69d79719f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a938277d8ff42313a16f8cf92f3da0.png)
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10 . 已知二次函数(a,b,c为已知数,且
)与y轴的交点是
.
(1)求c的值.
(2)若二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026808536f6b6d265c778e23836fbf13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ac77fd3cda9d08908e8829f86d3736.png)
(3)在(2)成立的情况下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46b4c7585238f53d85f5a96d35d95af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95842ad442c7f6d5ec4b32939b929e63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72850427e83ff19a24305783e080b280.png)
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