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函数是高中数学的重要内容,在高考数学中占有重要的比重,函数知识贯穿于高中数学的各个阶段,与其它教学内容有着千丝万缕的联系,掌握函数知识对于学好高中数学有着重要意义.高中函数内容较广,题型较多,求函数的值域作为一种重要的题型,在高考数学中出现的频率较高,如何选用合适的方法解决此类问题历来是高中数学教学的重要任务.本文结合具体教学实例简要阐述了换元法在求解函数值域过程中的实际应用.
Function is an important part of high school mathematics. It occupies an important proportion in mathematics of college entrance examination. Function knowledge runs through all stages of high school mathematics and is inextricably linked with other teaching contents. Mastering function knowledge is of great significance for learning mathematics in high school. The function of high school contains a wide range of questions and there are many kinds of questions. As an important question type, the value range of the function is frequently found in maths of college entrance examination. How to choose suitable methods to solve such problems has always been an important issue in high school mathematics teaching Task.In this paper, the practical application of the metamorphic element method in the process of solving the functional range is briefly described with reference to specific teaching examples.