如图,抛物线
经过点
,对称轴l如图所示,则下列结论:①
;②
;③
;④
,其中所有正确的结论是( )
![](https://img.xkw.com/dksih/QBM/2022/1/10/2891444870283264/2893425932959744/STEM/03c5af80-1fcd-4f24-b57f-273e97699435.png?resizew=131)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c766352f0be38b719621052de92615bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e7ef804eeb23618fbf91ead47587f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810961de0c2c5174c5be32e8e5b4bf21.png)
![](https://img.xkw.com/dksih/QBM/2022/1/10/2891444870283264/2893425932959744/STEM/03c5af80-1fcd-4f24-b57f-273e97699435.png?resizew=131)
A.①③ | B.②③ | C.②④ | D.②③④ |
更新时间:2022-01-13 09:13:02
|
【知识点】 根据二次函数的图象判断式子符号解读
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