1 . 已知二次函数
的图象经过点
,
,
.当
时,该函数有最大值
和最小值
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff4174146ea3aec6c60a95db8c1becc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059507d6e06dd6c065d444429cef6a73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce85fede768066b0b0f9acf915d02fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41884ec3b042343fd17d7b7664094694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18938707dd88a824c9f6d9b1870b56e9.png)
A.有最大值![]() | B.无最大值 | C.有最小值![]() | D.无最小值 |
您最近一年使用:0次
2 . 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)
您最近一年使用:0次
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
3 . 如图,抛物线
与x轴交于
,
,交y轴于点C,点P是线段
下方抛物线上一动点,过点P作
交
于点Q,连接
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/5716a1bb-c817-44e3-a866-2296bffc574e.png?resizew=431)
(1)求抛物线的函数解析式;
(2)求
周长的最小值;
(3)假设
与
的面积分别为
,
,且
,求S的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b77527caa01efcfc28dadcc959af94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2375a27ead9549550676d4e6a2b47243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1dae05f42110fde12a61fca98bc408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2952c1bb3373bd9cb2b8c59c8ec55f4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/5716a1bb-c817-44e3-a866-2296bffc574e.png?resizew=431)
(1)求抛物线的函数解析式;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831c4fbec375b0bfc8258ed9b1a81ef8.png)
(3)假设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c499b1f470978c4f8cc05ffdebc2e961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c495b8fd7f7bb21c177c9d50fbf6919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e6151dc6ef89bc79b1ca0dc63b291e.png)
您最近一年使用:0次
4 . 下面是某数学兴趣小组对二次函数最值问题进行的探究活动:
已知抛物线
与直线
交于点
.
任务一:求
的值和直线
的解析式;
任务二:当自变量
的取值范围为
时,求出函数
的最大值和最小值;
任务三:将抛物线
沿
轴平移
个单位长度,得到抛物线
,
且当自变量
满足
时,
的最小值为
,求
的值.
已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ca08000aa67fa320dfbf5cb717302b.png)
任务一:求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc2ac0d7b8a2d9c539588a3a7e3791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
任务二:当自变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e6c6d519f880597f0b7720e0ff0aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
任务三:将抛物线
![](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/f93a232c88870d213a7b74a796a1ff4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
且当自变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e6c6d519f880597f0b7720e0ff0aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59ab85c075a09d55d69e159e4abb268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
5 . 如图,在平面直角坐标系中,O为坐标原点,抛物线
经过点
,点P、点Q均在此抛物线上,其横坐标分别为m、
,抛物线上点P、Q之间的部分记为图像G(包括点P、点Q).连接
,以
为对角线作矩形
,且矩形
的各边均与坐标轴平行或垂直.
(2)当
时,该二次函数的最大值是______,最小值是______;
(3)当抛物线在矩形
内的部分所对应的函数值y随x的增大而减小时,直接写出m的取值范围;
(4)当矩形
的面积被坐标轴平分,且该抛物线的最低点是图像G的最低点时,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a02bdd28c0e0b73d3316aec5d9a7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1803dc3c76fd2b51696647aa18602412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ef2246507cc6a02bc17fab57d4fa2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92d41e173f51460bf0573cb3ac27e61.png)
(3)当抛物线在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
(4)当矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
您最近一年使用:0次
6 . 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)
您最近一年使用:0次
7 . 如图,在平面直角坐标系中,二次函数
的图像 与x 轴交于
,
两点,与y 轴交于点C .
(2)点P是直线
下方抛物线上的一个动点,连接
,线段
与
交于点 Q,设
的面积为
,
的面积为
,当
取最大值时,求点P的坐标;
(3)当
时, 二次函数的最大值与最小值的差是一个定值,请直接写出m 的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33afa8924f1af256a77d53e2ec2ba539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0d256036d52b784b8c68bfc8db69d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec0bc3a43265b63b6964476ca327fab.png)
(2)点P是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb7f6671691385e2caf3fcc4f41db56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c499b1f470978c4f8cc05ffdebc2e961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92905d020164683947943040ec19c530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38c43d922840f5f7693007beeb62b34.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a166d7120c23808aeb98e3109e00337.png)
您最近一年使用:0次
2024-06-01更新
|
447次组卷
|
3卷引用:2024年湖北省襄阳市谷城县中考一模数学试题
名校
8 . 如图,二次函数
图象交坐标轴于点
,
.点
为线段
上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/da17ed50-4fcf-4526-8496-e666f661de57.png?resizew=182)
(1)求二次函数的解析式及顶点坐标;
(2)过点
作
轴分别交线段
、抛物线于点
和点
,求线段
的最大值及此时
的面积;
(3)当
取最小值时,求此时点
的坐标及:
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298b7ec6eac30c0545bcadd7cc9755d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6bbbb53aaeab0ab7a242228cc510fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1bf75102d42949ac25e0b87c9ec2db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/da17ed50-4fcf-4526-8496-e666f661de57.png?resizew=182)
(1)求二次函数的解析式及顶点坐标;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a94436893a74f5a3a731256c8773ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3730e2fa70360e60286cff11b37c3051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740d0912f20a8b5281f82b0335a2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740d0912f20a8b5281f82b0335a2de.png)
您最近一年使用:0次
2024-01-13更新
|
219次组卷
|
2卷引用:天津市和平区2023-2024学年九年级上学期期末数学试题
9 . 在平面直角坐标系中,抛物线
的对称轴为直线
.
(1)求这条抛物线的解析式.
(2)当
时,求
的最大值和最小值.
(3)点
为这条抛物线上的一个动点,点
的横坐标为
(
),以点
为中心作正方形
,
且
轴.
①当抛物线落在正方形内部的点的纵坐标
随
的增大而减小时,求
的取值范围.
②正方形
的边与抛物线只有两个交点,且交点的纵坐标之差为
时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/974cf6ed500e27d2a9928db300645f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(1)求这条抛物线的解析式.
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120b6dab105ef5caf08a9fffeb8d6e55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/123071570a0cf22f09e563aadb6a874b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24624dffd30b66a5e4de57362b32b2a3.png)
①当抛物线落在正方形内部的点的纵坐标
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
10 . 如图,在平面直角坐标系中,已知二次函数
的图象与x轴交于点
和点
两点,与y轴交于点
.点D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D作
交抛物线第一象限部分于点P,连接
,记
与
的面积和为S,当S取得最大值时,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2375a27ead9549550676d4e6a2b47243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1dae05f42110fde12a61fca98bc408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca79b22396d7a03eecaf18dca63bf1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
(3)如图2,过动点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/844230a06538f3da2f51d8a5cadca06e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acee03d4bb4667b6c345221b6c9b0fa4.png)
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