如图,二次函数
的图像与
轴交于
两点,与
轴交于点
,直线l是抛物线的对称轴,
是抛物线的顶点.
(1)求抛物线的解析式及顶点
的坐标;
(2)如图,连接
,线段
上的点
关于直线
的对称点
恰好在线段
上,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc229acc8bf1a2047394bda863b1ea71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf398a8c6089534d9c8c946a9a3e903c.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求抛物线的解析式及顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)如图,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2020/4/24/2448426928398336/2449186393374720/STEM/bd805f18-af7b-4aa1-b5cc-6a3f834733de.png?resizew=263)
更新时间:2020-04-25 17:45:23
|
【知识点】 其他问题(二次函数综合)
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】在平面直角坐标系中,O为坐标原点,拋物线
经过点
,交
轴于点
,交
轴的正半轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/82359b41-6815-4a50-bcb2-1126c84a85af.png?resizew=401)
(1)如图1,求抛物线的解析式;
(2)如图2,点
在第三象限的拋物线上,横坐标为
,点
在射线
上,点
在
轴上,点
在射线
上,射线
交线段
于点
,若
,求
与
之间的函数关系,不必写出自变量
的取值范围;
(3)如图3,在(2)的条件下,点
在
轴的负半轴上,连接
,过
点作
于点
,连接
,若
,求
的值及点
的坐标,并判定点
是否在该抛物线上,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0da2f8379be6fd78b66746534c4db8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4ec13997c8c34ff2484491e4410dc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e1b99b77b3d78239835b52738bd6da.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/2024/3/5/82359b41-6815-4a50-bcb2-1126c84a85af.png?resizew=401)
(1)如图1,求抛物线的解析式;
(2)如图2,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/18e5cd74a2b5abb08124ab8d796a5b0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4771434a43ef4202325593a9d6931abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0be58386a87bee1e9302096a81d26d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46ce838f38419e8781d63b3417cac5e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)如图3,在(2)的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7604a8b88537e986f00db7b6d904c4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d5b97b39f9cd23246b4f5619e9d3eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/367433bf1e6fdd904dd73f973459ff1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,二次函数y=﹣x2+bx+c的图象与x轴交于点A(﹣1,0),点B(3,0),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/1da43ea8-63f4-4f05-ad49-d02a0379a407.png?resizew=172)
(1)求二次函数的表达式;
(2)将直线BC向上平移h(h>0)个单位长度,当直线BC与二次函数y=﹣x2+bx+c的图象只有1个交点时,求h的值;
(3)在二次函数图象的对称轴上,是否存在点P,使得∠PBA=75°?若存在,直接写出点P的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/1da43ea8-63f4-4f05-ad49-d02a0379a407.png?resizew=172)
(1)求二次函数的表达式;
(2)将直线BC向上平移h(h>0)个单位长度,当直线BC与二次函数y=﹣x2+bx+c的图象只有1个交点时,求h的值;
(3)在二次函数图象的对称轴上,是否存在点P,使得∠PBA=75°?若存在,直接写出点P的坐标;若不存在,请说明理由.
您最近一年使用:0次