如图,抛物线
与
轴交于点A(-1,0)、B(3,0),与
轴交于点C(0,3).
![](https://img.xkw.com/dksih/QBM/2014/1/13/1573698075148288/1573698081611776/STEM/dc1b5cce7c624d40a00dd35536a2ba43.png)
(1)求抛物线的解析式及顶点D的坐标;
(2)若P为线段BD上的一个动点,点P的横坐标为m,试用含m的代数式表示点P的纵坐标;
(3)过点P作PM⊥x轴于点M,求四边形PMAC的面积的最大值和此时点P的坐标;
(4)若点F是第一象限抛物线上的一个动点,过点F作FQ∥AC交x轴于点Q.当点F的坐标为 时,四边形FQAC是平行四边形;当点F的坐标为 时,四边形FQAC是等腰梯形(直接写出结果,不写求解过程).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3836a000fa859cd496089c04468f4881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/2014/1/13/1573698075148288/1573698081611776/STEM/dc1b5cce7c624d40a00dd35536a2ba43.png)
(1)求抛物线的解析式及顶点D的坐标;
(2)若P为线段BD上的一个动点,点P的横坐标为m,试用含m的代数式表示点P的纵坐标;
(3)过点P作PM⊥x轴于点M,求四边形PMAC的面积的最大值和此时点P的坐标;
(4)若点F是第一象限抛物线上的一个动点,过点F作FQ∥AC交x轴于点Q.当点F的坐标为 时,四边形FQAC是平行四边形;当点F的坐标为 时,四边形FQAC是等腰梯形(直接写出结果,不写求解过程).
更新时间:2016-12-05 19:19:51
|
相似题推荐
解答题-作图题
|
适中
(0.65)
名校
【推荐1】如图,在边长为1的正方形组成的网格中,△AOB的顶点均在格点上,点A、B的坐标分别是A(3,2),B(1,3).
(1)求△AOB的面积;
(2)点P在x轴上,当PA+PB的值最小时,在图中画出点P,并求出 点P的坐标.
(1)求△AOB的面积;
(2)点P在x轴上,当PA+PB的值最小时,在图中画出点P,并
![](https://img.xkw.com/dksih/QBM/2017/6/9/1705351799726080/1708931143294977/STEM/f43ca6b28f0b4fce9f8654aba55184da.png?resizew=216)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】“杭州丝绸”名扬天下,某网店专门销售某种品牌的丝巾,成本为30元/件,每天销售y(件)与销售单价x(元)之间存在一次函数关系,如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/38f4c14c-c4fd-4710-a4f7-dbb7aa1b8a9c.png?resizew=160)
(1)求y与x之间的函数关系式;
(2)如果规定每天丝巾的销售量不低于230件,当销售单价为多少元时,每天获取的利润最大,最大利润是多少?
(3)该网店店主热心公益事业,决定从每天的销售利润中捐出200元给希望工程,为了保证捐款后每天剩余利润不低于2800元,试确定丝巾销售单价的范围.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/38f4c14c-c4fd-4710-a4f7-dbb7aa1b8a9c.png?resizew=160)
(1)求y与x之间的函数关系式;
(2)如果规定每天丝巾的销售量不低于230件,当销售单价为多少元时,每天获取的利润最大,最大利润是多少?
(3)该网店店主热心公益事业,决定从每天的销售利润中捐出200元给希望工程,为了保证捐款后每天剩余利润不低于2800元,试确定丝巾销售单价的范围.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐3】某数学兴趣小组,开展项目式学习,问题如下:
如图,抛物线
与
轴正半轴分别交于
、
两点(点
在点
的右边),与
轴交于点
,点
为抛物线上位于第一象限内的一动点(
在
的右侧),过点
、
的直线交
轴于点
,过点
、
的直线交
轴于点
,连接
、
、
,试探究
、
、
、
之间的数量关系.为研究该问题,小组拟采用问题研究的一般路径一一从特殊到一般的研究方法:
,
,
.
①若点
的横坐标为3,请计算
;比较大小:
(填“
”,“
”或“
”).
②若点
的横坐标为
,上述
与
之间的数量关系是否仍然成立,若成立,请证明;若不成立,请说明理由.
(2)小明在研究时发现:当
、
两点的横坐标为
,
时,将抛物线变形为
,研究此问题更加方便,请借助小明的发现验证你的猜想.
(3)请利用上述经验,解决项目式问题,若
,请直接写出
的取值范围 .
如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37efb179686525e1a0aec162008f605.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/dad2a36927223bd70f426ba06aea4b45.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.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/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce4430b8b9b0c78de693513a7f88915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37d0f95679a6aab1e812d0099fd049b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ae4d1366da853e83cbe41668dc992f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fd0d33479d8f86083ad782ab76e1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
②若点
![](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/22ae4d1366da853e83cbe41668dc992f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fd0d33479d8f86083ad782ab76e1db.png)
(2)小明在研究时发现:当
![](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/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4588a79e160bca3711b1151a52f26b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b3a90c37a073a09a15a910e072ca8e.png)
(3)请利用上述经验,解决项目式问题,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56ad80f960c0d922fbdfec3f3196a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】二次函数
的图象与
轴的一个交点为
,另一个交点为
,且与
轴交于点
.
(1)求
的值和点
的坐标;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86667ae8cc7f37366f0c539cb189692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fd4da08956db1f206c8ea026f4e52d.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)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】已知点
是抛物线
(a,b,m为常数,
,
)与x轴的一个交点.
(1)当
,
时,求该抛物线的顶点坐标;
(2)若抛物线与x轴的另一个交点为
,与y轴的交点为C,过点C作直线l平行于x轴,E是直线l上的动点,F是y轴上的动点.
①求a的值;
②当点E落在抛物线上(不与点C重合),且
时,求点F的坐标(用含m的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57cf13af44d07bc950dd4e92cbdd34a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc895959e9bc92294dc9dd2263dbf0c5.png)
(2)若抛物线与x轴的另一个交点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62769b7177ef4bc952dc1dd51d6b510.png)
①求a的值;
②当点E落在抛物线上(不与点C重合),且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce726bceb02452bb4e5ed6b00fa94e9.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】二次函数
的图像经过
,
两点.
(1)当
时,判断
与
的大小.
(2)当
时,求
的取值范围.
(3)若此函数图像还经过点
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8794fdd5b979fa369ac350d063f631d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f445dad5a6c303bf75555ef44f4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09854751499971d55562552c9c7f384.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](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/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)若此函数图像还经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a574b4e5adc18b94c22822cf1d0b3b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b2d527e76722fc897e2b8b29df89c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b721631755367ad01c59eb768adb7509.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知抛物线
经过
、
、
)三点,直线l是抛物线的对称轴.
![](https://img.xkw.com/dksih/QBM/2022/12/28/3140708457709568/3147081040355328/STEM/d70ab3a7b96b47e3969dc57b32681308.png?resizew=162)
(1)求抛物线的函数关系式;
(2)设点P是直线l上的一个动点,当
的周长最小时,求点P的坐标;
(3)设点M是线段
上的一个动点,过M作x轴的垂线,交抛物线于点N,是否存在使
长度最大的点M,若存在,求出点M的坐标;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/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://img.xkw.com/dksih/QBM/2022/12/28/3140708457709568/3147081040355328/STEM/d70ab3a7b96b47e3969dc57b32681308.png?resizew=162)
(1)求抛物线的函数关系式;
(2)设点P是直线l上的一个动点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
(3)设点M是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,抛物线
经过点A(2,3),与x轴负半轴交于点B,与y轴交于点C,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/19/75430dd2-738f-4897-be0a-0485819270c1.png?resizew=342)
(1)求该抛物线的解析式;
(2)点D在y轴上,且
,求点D的坐标;
(3)点P在直线AB上方的抛物线上,当△PAB的面积最大时,直接写出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05581788393270ca7057397c95a7ef7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/19/75430dd2-738f-4897-be0a-0485819270c1.png?resizew=342)
(1)求该抛物线的解析式;
(2)点D在y轴上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c447053864409d493bed18d1d6253e.png)
(3)点P在直线AB上方的抛物线上,当△PAB的面积最大时,直接写出点P的坐标.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】【问题提出】
某兴趣小组开规综合实放活动:在正方形
中,
,动点
以每秒1个单位的速度从
点出发匀速运动,到达点
时停止,作
的垂线交
于
,连接
,设点
的运动时间为
,
的面积为
,探究
与
的关系.
【初步感知】
(1)如图1,当点
由
点向
点运动时,
①当
时,
______,
______;
②经探究发现
是关于
的二次函数,请写出
关于
的函数解析式为______;自变量取值范围为______;
(2)根据所给的已知,完成列表中的填空,并在图3的坐标系中绘制出函数的图象;
【延伸探究】
(3)①当
______时,
;
②当
的面积为
的一半时,求
的值.
某兴趣小组开规综合实放活动:在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1a48b92c61d209d0556e4cd8fdb70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/899253e7ed14d898720fcf58db5b6d7f.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/36a1b09c653185842513e24ebba60bb3.png)
【初步感知】
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59797180057c7f5920bfdff8f53b2427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd3b6b7e9aadb1189cb2a277a2f68f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
②经探究发现
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)根据所给的已知,完成列表中的填空,并在图3的坐标系中绘制出函数的图象;
![]() | ![]() | 0 | 1 | 2 | 3 | 4 | ![]() |
![]() | ![]() | 8 | 8 | ![]() |
(3)①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc660d144accaffb005f42e941fc9ca9.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次