例谈图示法解题汪德铮，谭惠新图示法解题应注意两点，其一是利用函数图象．其二是利用几何意义，如二者应用得当，就能充分发挥直观作用，使解题过程简捷明了。下面三个例子，皆选自中学课本，每例都给出两种解法，解法一摘于课本．解法二则利用图示法，通过比较，可看出... Examples of graphic methods to solve the problem Wang Dezhen, Tan Huixin graphic problem solution should pay attention to two points, one is the use of function images. The second is the use of geometric meanings. If the two are properly applied, they can fully exert their intuitive effects and make the problem-solving process simple and straightforward. The following three examples are all selected from the middle school textbooks. Two solutions are given for each case. The solution is taken from the textbook. The second solution method uses the graphic method. Through comparison, it can be seen that...