数学研究的对象是现实世界中的数量关系与空间形式．“数形结合”是中学数学极为重要的思想方法之一，把代数式的精确刻划与几何图形的直观描述结合起来，从而使几何问题代数化，代数问题几何化，并进而使抽象思维和形象思维结合起来，可以使许多复杂问题获得简捷解法．为... The object of mathematical research is the quantitative relationship and spatial form in the real world. “Number and shape combination” is one of the most important methods of thinking in middle school mathematics. It combines the algebraic accurate characterization with the intuitive description of geometric figures, so that the geometric problems are algebraic, the algebraic problems are geometric, and then the abstract thinking and image The combination of thoughts can make simple solutions to many complex problems. for...