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往往有这样一些数学选择题,它们所给的条件具有可变性,或所给的图形具有随意性,或问题的选择对象是针对一般情况给出的.倘若这时我们能从题目中获取一些暗示信息,采取一种特殊的解题策略,就能化难为易,巧妙地解答这类选择题.“特例法”就是解这一类选择题的一种有效策略.我们知道,特例情况是一般情况在具体的、特殊背景下的表现形式,若能有效借助
There are often some mathematical choice, they are given the conditions of variability, or given the randomness of the graphics, or the choice of the problem is given for the general situation, provided that at this time we can get some hints from the title Information, to take a special problem-solving strategy, we can make it difficult for the difficult, cleverly answer these types of multiple choice questions. “Special case ” is an effective strategy for solving this type of multiple-choice questions. We know that special cases The general situation in the specific, special context of the performance, if effective help