作为函数三要素的一个重要组成部分——函数的定义域,在学生的习题中确是占有相当的比重。如何才能够轻松掌握定义域的求解方法,就应该及时地提到我们的课堂记事日程上来。笔者在自己的教学实践中作出如下归纳,仅供各同仁及学生参考。 As a function of the three elements of an important component - the domain of the function, in the student’s exercise does indeed occupy a considerable proportion. How to easily grasp the domain of the solution, it should promptly refer to our class notes calendar up. The author made the following induction in his own teaching practice, for reference of all colleagues and students only.