抛物线
(a,b,c为常数)开口向上,且过点
,下列结论:①
;②
;③若点
都在抛物线上,当
时
;④若方程
没有实数根,则
,其中正确结论的是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca32c6e163918e674463b012f467380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c98c2fc5fe2dd8f4f5ed2ab6efa99a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbed2648fc50f84390e68c78b37245e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c171f79dd8d522a60e0ce8c52af99dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3eaf72b3a7453bd4237074be11bc24.png)
更新时间:2022-12-06 06:24:03
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