对于抛物线
,下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d81f647f09061fe48d18211d60b83b1e.png)
A.若顶点在x轴下方,则一元二次方程![]() |
B.若抛物线经过原点,则一元二次方程![]() |
C.若![]() |
D.若![]() ![]() |
2012·江西·中考真题 查看更多[4]
更新时间:2020-09-11 10:07:16
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【推荐1】已知二次函数
,当
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A.![]() | B.![]() | C.![]() | D.![]() |
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单选题
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较易
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【推荐2】如图,抛物线的对称轴为
.若这条抛物线经过
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/4b7de89c-811a-4abb-b5ac-a8f171dde922.png?resizew=153)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b5f1fbccef6504f1a765d0d0067e27.png)
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A.![]() | B.![]() | C.![]() | D.无法确定 |
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名校
【推荐1】若二次函数
的对称轴为直线
,则关于x的方程
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9230d21868312e0ae90280fe6e6436f9.png)
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【推荐2】已知二次函数
的图象如图,且关于
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没有实数根,有下列结论:①
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;④
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/7037bf78-cdc2-44de-bc41-7168c6dfb173.png?resizew=117)
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A.0 | B.1 | C.2 | D.3 |
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