新考向·图表信息题(2024北京中科大附中月考)二次函数 y=ax^2+bx+ c 的x与y的部分对应值如下表:X-101234y m212510则m的值为() A.1 B.2 C.5 D.10 相关知识点: 试题来源: 解析 C函数图象经过(0,2),(2,2),抛物线的对称 轴为直线x=1,点(3,5)和点(-1,m)关于对称轴 对称 m=5. ...
12. 已知抛物线 y=ax^2+bx+ c 上部分点的横坐标 x 与纵坐标y的对应值如下表:-1 0234y522510如果点 ( -2,m) 在此抛物线上, 那么 m=__10 相关知识点: 试题来源: 解析 答案见上【解析】 【分析】根据题目表中数据,利用待定系数法确定函数关系式,再由点(-2.m)在此抛物线上,代值求解即 可得...
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