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用“消元法”化多元为一元可求出方程组的解.有些特殊方程却偏要反其道而行之,需要变一元为多元用“增元法”才能顺利求出其解.下面结合竞赛试题举例说明.
Using the “elimination method” to multivariate to one dollar can solve the solution of the equations. Some special equations have to do the opposite and need to change one dollar to multivariate to use the “growth yuan method” to get the solution smoothly. An example of combining the contest questions.