已知:如图抛物线y=ax2+bx+
与y轴交于点A,与x轴交于点B、点C.连接AB,以AB为边向右作平行四边形ABDE,点E落在抛物线上,点D落在x轴上,若抛物线的对称轴恰好经过点D,且∠ABD=60°,则这条抛物线的解析式为( )
![](https://img.xkw.com/dksih/QBM/2019/9/23/2297020788817920/2297485479084033/STEM/b525aab1abb5410ab9422861beac68ec.png?resizew=246)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2019/9/23/2297020788817920/2297485479084033/STEM/b525aab1abb5410ab9422861beac68ec.png?resizew=246)
A.![]() | B.![]() |
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更新时间:2019-11-19 17:42:15
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