“数形结合”是通过数(数量关系)与形(空间形式)的相互转化、互相作用来解决数学问题的一种思想方法。其实质是将抽象的数学语言与直观的图形结合起来,使得抽象的数学概念或复杂的数量关系直观化、形象化和简单化。著名数学家华罗庚说过:“数缺形时少直观,形少数时难入微,数形结合百般好,隔裂分家万事休。”这句话形象、简明、扼要地指 “Combination of numbers and shapes ” is a way of thinking to solve mathematical problems through the interaction between number (quantity) and shape (space). The essence is to abstract the mathematical language and visual graphics together, making abstract mathematical concepts or complex quantitative relationship between visualization, visualization and simplification. Hua Luogeng, a famous mathematician, said: “The lack of shape is less intuitive when in the shape of a few, and it is more difficult to form a few, the combination of shapes and numbers is better, and everything is separated from each other.” This sentence concisely and concisely refers to