抛物线
的对称轴为直线
,部分图像如图所示,下列判断中,①
;②
;③
;④
;其中判断正确的选项( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/515b8041-b8dc-4fdb-a1ee-8efd36108657.png?resizew=122)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbbcf3f7721240b8d2161f8c66a0fcf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630bb948780be53bc73d9ddef875000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad29acf28ab96fb1604e80c743bd738f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/515b8041-b8dc-4fdb-a1ee-8efd36108657.png?resizew=122)
A.1个 | B.2个 | C.3个 | D.4个 |
21-22九年级上·广东江门·期中 查看更多[2]
更新时间:2023-01-04 20:35:47
|
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单选题
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较易
(0.85)
【推荐1】如图,二次函数
的图形与
轴交于
两点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/035df3b539d4cbe9f39354d170ec9cfd.png)
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A.![]() ![]() | B.点A的坐标为![]() |
C.![]() | D.当![]() |
您最近一年使用:0次
单选题
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较易
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【推荐2】已知二次函数
的图象开口向上(如图),它与
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,
,对于下列结论:①
;②
;③
;④
.其中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/574defc4-4ab4-40e4-80ba-ee6401c74146.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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A.4个 | B.3个 | C.2个 | D.1个 |
您最近一年使用:0次
单选题
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较易
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【推荐1】二次函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375386102cba5bfd93bdf340216eb22d.png)
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A.①④ | B.②③ | C.①③④ | D.①②③④ |
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【推荐2】已知抛物线y=x2﹣x﹣1与x轴的一个交点为(m,0),则代数式m2﹣m+1的值为( )
A.0 | B.1 | C.![]() | D.2 |
您最近一年使用:0次