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三次函数问题是导数应用部分最简单的问题.由于知识局限和能力要求的因素,它几乎是文科高考解答题必考内容.本文旨在对三次函数的图象特征给出分类,以使考生从宏观上(进而从微观上)把握三次函数的图象特征及函数性质,以此来指导解题.
The cubic function problem is the simplest problem in the derivative application part. Due to the limitations of knowledge and ability requirements, it is almost the subject of the liberal arts college entrance examination. This paper aims to give a classification of the image features of the cubic function so that candidates can Macroscopically (and then microscopically) grasp the image features and function properties of the cubic function to guide the problem solving.