1)(a¹/³+b¹/³)/(a²/³-a¹/³*b¹/³+b²/³)/(a²/³-a¹/³*b¹/³+b²/³)=(a¹/³+b¹/³)
2)(a¹/³-b¹/³)/(a²/³+a¹/³*b¹/³+b²/³)/(a²/³+a¹/³*b¹/³+b²/³)=(a¹/³-b¹/³)
3) (a¹/³+b¹/³)-(a¹/³-b¹/³)=2b¹/³=2∛b
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1)(a¹/³+b¹/³)/(a²/³-a¹/³*b¹/³+b²/³)/(a²/³-a¹/³*b¹/³+b²/³)=(a¹/³+b¹/³)
2)(a¹/³-b¹/³)/(a²/³+a¹/³*b¹/³+b²/³)/(a²/³+a¹/³*b¹/³+b²/³)=(a¹/³-b¹/³)
3) (a¹/³+b¹/³)-(a¹/³-b¹/³)=2b¹/³=2∛b