如图所示,在平面直角坐标系
中,已知二次函数
的图象与x轴交于点
,与y轴交于点B.
(1)求该函数的表达式及顶点坐标;
(2)将该二次函数图象在点A,B之间的部分(含A,B两点)记为图象W,点Q在图象W上,连接QA,QB,求
面积的最大值;
(3)点P(m,n)在该二次函数图象上,当
时,该二次函数有最大值2,请根据图象求出m的值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/220f77f8740bcde0dfaa3b51b16f775d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f34ae92ed34d6a0294ee7e68796fc4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/0dbe743d-c946-421a-b7e8-dadf473c7fc9.png?resizew=202)
(1)求该函数的表达式及顶点坐标;
(2)将该二次函数图象在点A,B之间的部分(含A,B两点)记为图象W,点Q在图象W上,连接QA,QB,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
(3)点P(m,n)在该二次函数图象上,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2198978baa5a994212ecd40c2a6ad351.png)
更新时间:2023-11-04 07:52:19
|
相似题推荐
解答题-问答题
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较难
(0.4)
【推荐1】如图1,抛物线
与x轴的正半轴交于A、B两点,与y轴交于点C,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/bf103d14-b20a-4340-bb34-535e73a33696.png?resizew=249)
(1)求抛物线的解析式;
(2)连接
,点D在抛物线上,且点D到直线
的距离为
,直接写出点D的横坐标;
(3)如图2,向上平移直线BC交抛物线于P、Q两点,直接
、
分别与y轴的负半轴交于M、N两点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb2aedb74c5dc5f08b51449140a198b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/bf103d14-b20a-4340-bb34-535e73a33696.png?resizew=249)
(1)求抛物线的解析式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(3)如图2,向上平移直线BC交抛物线于P、Q两点,直接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ffca492d5f4cc72de4d9d00f95a4d0.png)
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较难
(0.4)
【推荐2】在平面直角坐标系中,抛物线
(
、
为常数)的对称轴为直线
,且经过点
.点
在该抛物线上,其横坐标为
.
(1)求此抛物线对应的函数表达式;
(2)当
时,求函数
的最大值和最小值;
(3)将此抛物线上
、A两点之间的部分(包括
、A两点)记为图象
,当图象
与直线
只有一个公共点时,求
的取值范围;
(4)设点
的坐标为
,当
不与坐标轴平行时,以
为对角线构造矩形
,且
轴.当拋物线与矩形
的边只有两个交点,且交点的纵坐标之差为
时,直接写出
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b2cc0d2f6d3eee9a33db83e0c0830d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)求此抛物线对应的函数表达式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836d745b71ec18b1135e8bbf6990bffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)将此抛物线上
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78e63c039867b9d64b10f20671bb157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(4)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2fb27797a9925a09e4faf3ec69cc77e.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/e19a722a1564ff4cecc6e1b5a6c59096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31da7291140e430a11e2a10cc6cdefbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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较难
(0.4)
【推荐1】如图,在平面直角坐标系中,直线
分别交
轴、
轴于A、B两点,过点
作
轴垂线,垂足为
,连接
.现有动点
同时从
点出发,分别沿
向终点
和终点
运动,若点
的运动速度为每秒
个单位长度,点
的运动速度为每秒2个单位长度.设运动的时间为
秒.
(2)当
时,
__________;
(3)设
的面积为
,写出
与
的函数关系式,并求
面积的最大值;
(4)当
为轴对称图形时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31c4f39399ec245a67db2933ed639f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffabaeaf60b2cf8aba534b001d27e0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82d579a717399137b8c6d475d33cd4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4f7e460ff33e4853e6cd738d893573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】在平面直角坐标系
中,已知抛物线
的图像与
轴交于点
和点
,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/0951fbc1-94f1-49b9-a31b-c21d842490d8.png?resizew=178)
(1)求抛物线的解析式;
(2)求
的面积;
(3)若点
是抛物线上位于第一象限的一点,问是否存在这样的点
,使得点
到
的距离最大?若存在,请求出此时点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8f59569cabd37ad8d42b3c18847439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241ce9bd28046ce9b90f43b391132884.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://img.xkw.com/dksih/QBM/editorImg/2023/12/9/0951fbc1-94f1-49b9-a31b-c21d842490d8.png?resizew=178)
(1)求抛物线的解析式;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)若点
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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