数学中的很多概念都有一定的几何意义,本文作者根据教学实践认为要树立学生数形结合的思想,就要善于挖掘数学概念的几何意义;要注意培养学生看见函数式立即想到它的图像,结合实际图像记性质、用性质的好习惯;数形要结合,关键在于能根据函数式(或方程)画出图形和根据代数式分析其表示的几何意义。 Many concepts in mathematics have certain geometric meanings. According to the teaching practice, the author thinks that to establish the idea of ​​combining number with form, we should be good at digging out the geometric meaning of mathematical concepts; we should pay attention to cultivate students to see the function immediately think of its image, Combined with the actual image of the nature of the nature of good habits; number to be combined, the key lies in the function (or equation) to draw the graph and according to algebraic analysis of the meaning of its representation.