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设函数f(x)=|x|⼀x,则lim(x→0)f(x)=
设函数f(x)=|x|⼀x,则lim(x→0)f(x)=
2025-04-04 04:03:10
推荐回答（1个）
回答（1）：
首先，函数的定义域为x不等于0，有绝对值的应该先去绝对值，去绝对值意味着分类讨论，用左右极限来讨论，当x从负趋于0时，f(x)=-1,当x从正趋于0时，f(x)=1
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