数形结合是重要的数学思想和方法 ,在解题中 ,恰当地利用几何图形来研究问题会显得十分直观 ,有时可避免繁复的数式计算 .但“直观”的主要作用是启迪思维、发现和提出猜想 ,一般来说 ,不能凭借直观得出结论 .不把“数”和“形”结合起来 ,只用“图象解法”常会使我们的解题陷? The combination of number and shape is an important mathematical idea and method. In solving a problem, it is very intuitive to properly use geometric figures to study problems, and sometimes it is possible to avoid complicated numerical calculations. But the main function of “intuition” is to inspire thinking, discovery, and To put forward a conjecture, in general, we cannot draw conclusions intuitively. Without combining “number” and “form”, only using “image solution” often causes our solutions to be trapped.