观察二次函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
的图像,下列四个结论:
①
;②
;③
;④
.正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/18/cb03eefa-63f4-4ee5-a3f4-8577b2c93249.jpg?resizew=121)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/312782dee00de23c5fc034f10ec1515d.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661d5d8b2344d1ad2b7bf1490b16191b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b1edb715766b2b28b63d09701d75e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d064c28a84550fdf215e9296cdbb879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d2e020003b2cab2ef87973b182f271.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/18/cb03eefa-63f4-4ee5-a3f4-8577b2c93249.jpg?resizew=121)
A.4个 | B.3个 | C.2个 | D.1个 |
14-15九年级·河南郑州·阶段练习 查看更多[6]
2015届河南省郑州市九年级第一次质量预测数学试卷(已下线)【万唯原创】2016年河南省中考数学-2015年真题-郑州市2015年九年级第一次质量预测河南省郑州名校联盟2020-2021学年九年级上学期12月联考数学试题2024年山东省淄博市周村实验中学中考数学一模模拟试题(3月份)2024年山东省淄博市周村实验中学九年级中考数学模拟预测题(3月份)2023年广东省湛江市霞山区实验中学中考一模数学试题
更新时间:2016-12-05 23:15:35
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(
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