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反函数的概念和性质是高中数学教材中的一个难点,又是学生必须掌握的一个重要内容。深刻理解函数与其反函数的概念和性质,有助于诸如指数函数与对数函数、三角函数与反三角函数等互为反函数的基本初等函数的学习。
The concept and nature of the inverse function is a difficult point in high school mathematics textbooks, but also an important content that students must master. A deep understanding of the concepts and properties of functions and their inverse functions facilitates the learning of fundamental elementary functions such as exponential functions and logarithmic functions, trigonometric functions and inverse trigonometrical functions that are inverse functions of each other.