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在数学问题中,出现条件x+y=a时,我们常作代换x=a/2+t,y=a/2-t,这种代换称为均值代换.本文举例说明均值代换的应用.
In the mathematics problem, when the condition x+y=a occurs, we often substitute x=a/2+t,y=a/2-t. This substitution is called the mean substitution. This article illustrates the mean value generation. Change application.