已知二次函数
(
是常数),满足
且
.
下列四个结论:①
;
②抛物线与
轴一定有两个不同的公共点;
③若抛物线经过
,则
;
④对满足
的任意实数
,都有
.
其中正确的是___________ (填写序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce613eaa5df46a50174085ef5d1087fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
下列四个结论:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f2e8b5365c2f086a02e5dd3c3bd116.png)
②抛物线与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
③若抛物线经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc20d351d51723c9b0a07a20ac14114.png)
④对满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e109e04854b959829581999aed8cb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45a73a9dea188499c6011bcb8b5527d.png)
其中正确的是
22-23九年级上·湖北武汉·期中 查看更多[3]
湖北省武汉市洪山区2022-2023学年九年级上学期期中数学试题(已下线)专题22.18 二次函数图象判断各项系数和式子的符号(分层练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)湖北省武汉市2022-2023学年九年级上学期期中模拟数学试题
更新时间:2022-11-30 18:30:47
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