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树立一种观点——“运动变化”的观点函数概念是中学数学一个重要的基本概念,标志着常量数学向变量数学的迈进,其核心的意义是反映出了一个在某一个变化过程中
Establishing a viewpoint—The concept of viewpoint function of “movement change” is an important basic concept of middle school mathematics. It marks the progression from constant mathematics to variable mathematics. Its core meaning is to reflect a change in a certain process.