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在求条件分式的值时,常遇到求多元分式值的问题,用归一的思想方法是求解这类问题的一种十分有效的方法,请看下面几例.
When seeking conditional fractional values, we often encounter the problem of seeking multivariate fractional values. Using the normal method of thinking is a very effective way to solve such problems. See the following examples.