已知抛物线的解析式为
.
(1)求抛物线与
轴的交点坐标;
(2)写出这条抛物线的对称轴;
(3)求出抛物线在
轴上方的部分所对应的自变量
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ce86a35c15619c12b4959dbc003987.png)
(1)求抛物线与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)写出这条抛物线的对称轴;
(3)求出抛物线在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2023-09-21 14:53:43
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知抛物线
经过点(1,0)和点(0,3).
(1)求此抛物线的解析式;
(2)当自变量x满足
时,求函数值y的取值范围;
(3)将此抛物线沿x轴平移m个单位长度后,当自变量x满足
时,y的最小值为5,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
(1)求此抛物线的解析式;
(2)当自变量x满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a417f68c6538bfb63e729c047755b4ef.png)
(3)将此抛物线沿x轴平移m个单位长度后,当自变量x满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e6c6d519f880597f0b7720e0ff0aa3.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
经过点
,与y轴交于点B.
(1)求抛物线的函数表达式和顶点坐标;
(2)抛物线上有一动点
,若点P到y轴的距离不大于2时,
,求
的值;
(3)在x轴上有一动点M,将线段
绕点M逆时针旋转
得到线段
,当线段
与抛物线有公共点时,请直接写出点M横坐标m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2068b108f0cf594e0fd9115392778359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
(1)求抛物线的函数表达式和顶点坐标;
(2)抛物线上有一动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952ac1f18091f9ec075a1a826c76517f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db8d3facff8f90f28a936fc5b3ab878.png)
(3)在x轴上有一动点M,将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6637859805b7b01f7a9a64771563406e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6637859805b7b01f7a9a64771563406e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知抛物线L:y=-x2+3x+4与x轴交于A、B两点(点A在点B的左侧),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2022/6/7/2996402872565760/2998842645094400/STEM/79f628b02bf843bf96e7f2ce7895bb0f.png?resizew=161)
(1)求A、B两点的坐标及抛物线L的对称轴;
(2)平移抛物线L得到新的抛物线
,且抛物线
过点B,点D,以A、B、D为顶点的三角形恰好与△ABC全等,求平移后的抛物线L'的表达式.
![](https://img.xkw.com/dksih/QBM/2022/6/7/2996402872565760/2998842645094400/STEM/79f628b02bf843bf96e7f2ce7895bb0f.png?resizew=161)
(1)求A、B两点的坐标及抛物线L的对称轴;
(2)平移抛物线L得到新的抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf90af48c665ee801c05cc55914b8fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf90af48c665ee801c05cc55914b8fd.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,抛物线
与
轴交于
,
两点(点
在点
的左侧),与
轴交于点
.直线
与抛物线交于
,
两点,与
轴交于点
,点
的坐标为
,点
是抛物线上的点.
(1)请直接写出
,
两点的坐标及直线
的函数表达式;
(2)若点
的横坐标为
,过点
作
轴,垂足为
.
与直线
交于点
,当点
是线段
的三等分点时,求点
的坐标;
(3)若点
是对称轴上的点,若以点
,
,
,
为顶点的四边形是平行四边形,直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0116aca690b431a7b75627d8464e2260.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/5963abe8f421bd99a2aaa94831a951e9.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20e8636a2a9c4b3d588a9d29f24ec0ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/987aa21c-01fe-4a34-ad97-fded67c4a644.png?resizew=280)
(1)请直接写出
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff524bf44727c98630b95f083c880a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】根据二次函数和一元二次方程、一元二次不等式的关系解答如下问题:
(1)由一元二次方程
的两根为____________,可知二次函数
与
轴两个交点的坐标为____________;
(2)用配方法将二次函数
化成
的形式;
(3)由以上信息,并结合该二次函数图像可知:该函数图像的对称轴是______,顶点坐标是______,不等式
的解集是______.
(1)由一元二次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b0b55c3297ce66c96d1559d76971f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620fff76456e4080c41c51661171c66f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)用配方法将二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620fff76456e4080c41c51661171c66f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ddc0a29bfef85c1441d02ff117a183.png)
(3)由以上信息,并结合该二次函数图像可知:该函数图像的对称轴是______,顶点坐标是______,不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8853e02cfa11fdca84d2e8a0e3d099d.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】在平面直角坐标系
中,二次函数
的图象过点
.
(1)求该二次函数的解析式;
(2)用描点法画出该二次函数的图象;
(3)当
时,对于x的每一个值,都有
,直接写出k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0a69144e8a38f3ed31018d5a21b026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0fbd2dd3beb7f5d162211a14c86b4.png)
(1)求该二次函数的解析式;
(2)用描点法画出该二次函数的图象;
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b94f151c00959a1cd3946e7f8405337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a0a3578feba433f365e47a93d7f677.png)
您最近一年使用:0次