本文介绍利用找关键点或模糊自变量系数指数法,快速解决一类动态类型的函数图象问题.找关键点,即抓住问题中的起始点或结束点,一般可以排除一个或两个答案.模糊自变量系数指数法,是指解题时无须知道一个对象的代数式具体是什么,而只要了解该代数式中自变量的系数符号是正数还是负数,指数是多少次,即可作出相关判断.例1如图1,在正方形ABCD中,点P从点A出发,沿着正方形的边顺时针方向运动一 This article describes the use of key points or fuzzy coefficient of variation index method to quickly resolve a dynamic type of function image problem.Considering the key point, that is, to seize the problem of the starting point or end point, you can usually rule out one or two answers The index method of fuzzy independent variables means that it is not necessary to know what the algebra of an object is when solving a problem, but to know the sign of the coefficient of the argument in the algebra is positive or negative, and how many times the index can make relevant judgments. Example 1 As shown in Figure 1, in a square ABCD, point P starts from point A and moves clockwise along the side of the square by