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函数是初中代数重点知识之一,学好函数是进一步学好数学以及其他学科的重要基础,尤其函数的图像部分最为精彩.本文以2003年全国各地的中考试题为例,帮助同学们把握函数的考点. 一、函数的概念
The function is one of the key knowledge of junior high school algebra. Learning a function is an important foundation for further study of mathematics and other disciplines. In particular, the image part of the function is the most exciting. This article took the middle school examination questions throughout the country as an example to help students grasp the test points of the function. First, the concept of function