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在中学数学課中,充分地运用数形結合的方法进行教学,它的重要意义已經有很多同志写过文章,詳細地分析过了。笔者通过教学实践,又进一步深刻地体会了它的重要性,尤其是在“函数”的教学中,它可以起着如下所述的几个作用: (1) 通过图象可以使同学更理解函数关系中的量与量之間的关系,又能加深关于函数性貭的記忆。(2)了解某些知識的实际意义,例如,解方程就是求函数的图象与x軸的交点等等。(3) 解决某些問題时能熟练地应用函数的性貭,并能速度快,結果正确。为此,笔者愿将个人在二次函数、指数函数和对数函数以及三角的教学中,所采取的主要的措施写出来,用作同志们的参考,并希得到指正。 1.在二次函数y=ax~2+bx+c的教学中突出函
In the middle school mathematics class, the teaching method is fully utilized with the method of combination of numbers and shapes. Its important meaning has been written by many comrades and analyzed in detail. Through the teaching practice, the author has further profoundly understood its importance, especially in the teaching of “function”, it can play several roles as follows: (1) Through the image can make students understand the function more The relationship between quantity and quantity in relationships can also deepen the memory of functional ambiguity. (2) Understand the actual meaning of certain knowledge. For example, solving the equation is to find the intersection of the image of the function with the x-axis. (3) Proficiency in the application of functions can be used to solve certain problems, and the speed can be quick and the result can be correct. For this reason, I would like to write out the major measures taken by individuals in secondary functions, exponential functions, logarithmic functions, and trigonometric teaching as a reference for comrades and to get corrections. 1. In the teaching of the quadratic function y=ax~2+bx+c