2018_2019学年高中数学第二章函数2.1.1函数情境导学素材新人教B版必修1.doc

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12.1.1 函 数【情境导学】 QQ 是即时聊天工具,通过 QQ,我们可以结交很多全国各地的新朋友,可以与远方的亲朋好友面对面地交流,省钱、快捷、方便,可以传送文件,还可以通过聊天练习打字,学习上网等.通过 QQ,我们开心的时候可以找人分享,我们不开心的时候可以找人倾诉,所以说现在 QQ 成了我们生活不可缺少的一部分. 大部分的同学都有 QQ 号,这样 QQ 号与同学之间就有对应关系,即QQ 号(可能不止一个)某同学.在数学领域也有类似的对应关系吗?答案:数学中也有很多类似的对应关系,即数 x(可能不止一个)对应 y(唯一一个),数学上的这种数之间的对应关系即为函数关系.

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