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分式的运算,通分是关键,而通分的技巧性很强,若能根据分式算式的结构特征,选择恰当的通分方法,则能使问题化繁为简、化难为易,从而收到事半
Fractional calculations and pass-throughs are the key points, and the pass-through skill is very strong. If we can select the appropriate pass-by-point method according to the structural features of the fractional formulas, we can simplify the problems and make it difficult to solve problems. Received half