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常规方法是解题的基本思路,但有时却要跳出框框,运用发散思维,另辟解题途径.如分母有理化是二次根式化简的基本方法,但有些题目不用分母有理化反而简便.下面列举数例来说明.
The conventional method is the basic idea of problem solving, but sometimes it is necessary to jump out of the box and use divergent thinking to open up another way to solve problems. If denominator rationalization is the basic method of secondary radical simplification, but some topics are not easy to use without denominator rationalization. Here are a few examples to illustrate.