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分式的有关概念和性质与分数相类似.如分式的分母的值不能是零,即分式只有在分母不等于零时才有意义;又如分式的分子与分母都乘以(或除以)同一个不等于零的整式分式的值不变.这一性质是分式运算中通分和约分的理论根据.在分式运算中,主要是通过约分和通分来化简分式,从而对分式进行求值.有一些题目,还要根据分式的具体结构、特点灵活变
The concept and nature of a fraction is similar to a fraction, where the value of the fractional denominator can not be zero, meaning that the fraction has meaning only if the denominator is not equal to zero, or the fractional numerator and denominator are multiplied by ) To the same integer not equal to zero the value of the integral invariant.This property is the theoretical basis for the pass and approximate the fractional operation.In the fractional operation, mainly through the approximate points and pass points to simplify the formula , So as to evaluate the fractional.There are some questions, but also according to the specific structure of fractional, flexible features