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分母中含两项以上根式的分母有理化题,如果采用基本方法化简,计算量是很大的,也容易出差错.若能根据题目结构特点,挖掘题中隐含的简便方法(先作适当变形化简),便会减少计算量,从而得心应手获得化简结果.下面分十种类型举例说明.一、有的题应先合并同类项,后分母有理化
The denominator in the denominator with two or more fundamental denominators has a rationalization problem. If the basic method is used to reduce the complexity, the calculation amount is very large and it is also easy to make mistakes. If the problem can be solved according to the characteristics of the topic structure, the implicit method implicit in the problem can be explored. Simplification of the appropriate reduction) will reduce the amount of calculations, so as to obtain simplified results. The following types of ten examples illustrate. First, some questions should be merged with similar items, after denominator rationalization