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函数的单调性是函数的重要性质,在解题时常常用到.而对函数单调性的判断又是研究函数单调性最基础的工作.下面给出四种方法,供同学们参考
The monotonicity of a function is an important property of the function. It is often used when solving a problem. The monotonicity of a function is the most basic work for studying the monotony of a function. The following four methods are given for students to refer to.