
从计算的难易看,二者差别不大。不过,用除法算一开始就给了你信心。解决了存在性的问题。另外,用除法算,可以直接用计算器算。


从计算的难易看,二者差别不大。不过,用除法算一开始就给了你信心。解决了存在性的问题。另外,用除法算,可以直接用计算器算。

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