如图,已知抛物线的解析式为
与x轴交于A、B两点,与y轴交于点C.
(1)求A、B、C三点的坐标;
(2)若点D在该二次函数上,且
,求点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8016e77f789ffc0fc7d51abecfa1956d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/4b16423e-4998-4e5e-9dd5-9afeb28369d7.png?resizew=137)
(1)求A、B、C三点的坐标;
(2)若点D在该二次函数上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce99ef52adf74478149913be71bc5722.png)
更新时间:2023-12-10 21:13:20
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【推荐1】如图,在平面直角坐标系xOy中,抛物线y=ax2+2x+c的部分图象经过点A(0,-3),B(1,0) .
(1)求该抛物线的解析式;
(2)结合函数图象,直接写出y<0时,x的取值范围.
(1)求该抛物线的解析式;
(2)结合函数图象,直接写出y<0时,x的取值范围.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/abc4a7e9-8612-497f-95d4-bcaac3f97bd5.png?resizew=159)
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【推荐2】已知一个二次函数的对称轴是x=1,图象最低点P的纵坐标是﹣8,图象过(﹣2,10)且与x轴交于A,B与y轴交于C.求:
(1)这个二次函数的解析式;
(2)△ABC的面积.
(1)这个二次函数的解析式;
(2)△ABC的面积.
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【推荐1】如图,抛物线
与x轴交于A、B两点,顶点为C、点P为抛物线上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/9a9729db-9728-49c9-8e6d-202284dc16aa.png?resizew=148)
(1)A___;B_____;C______;
(2)求P点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e61e0a1bc2ab34fe0cd1de9f59b0e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8db02b25beecbccd333e74161634c31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/9a9729db-9728-49c9-8e6d-202284dc16aa.png?resizew=148)
(1)A___;B_____;C______;
(2)求P点的坐标.
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【推荐2】已知二次函数
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/f1f3717d-eb2e-4517-8999-f18dee1c3170.png?resizew=300)
(1)在如图坐标系中画出这个二次函数的图象(注明与坐标轴的交点、顶点坐标及对称轴);
(2)观察图象,若点
是这条抛物线上的三个点,请用“
”连接
的大小关系 ;
(3)设抛物线交
轴于A、B两点,交
轴于点C,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3236d825b994ee9c28e5d5479a57b8ed.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/f1f3717d-eb2e-4517-8999-f18dee1c3170.png?resizew=300)
(1)在如图坐标系中画出这个二次函数的图象(注明与坐标轴的交点、顶点坐标及对称轴);
(2)观察图象,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132c4b12f999884d4b7720c52fb5ec95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350db0e4b2b7d1e32962028e391d9fba.png)
(3)设抛物线交
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【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.
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【推荐2】如图,抛物线
与
轴交于
,
两点,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/2023/3/19/3197798245416960/3256137180848128/STEM/f22026934e0145499743c3d6c0d0d2ab.png?resizew=393)
(1)求该抛物线的解析式及顶点坐标;
(2)若点
是抛物线的对称轴与直线
的交点,点
是抛物线的顶点,求
的长;
(3)抛物线上是否存在点
使得
?如果存在,请直接写出点
的坐标;若不存在,请说明理由.
![](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/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.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/2023/3/19/3197798245416960/3256137180848128/STEM/f22026934e0145499743c3d6c0d0d2ab.png?resizew=393)
(1)求该抛物线的解析式及顶点坐标;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)抛物线上是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/616fbd7700d7f4eb431073311555e095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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