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B. Define R on P({1,2,3}) by ARB iff |A| = |B|. Prove that R is an equivalence relation on P({1,2,3}). %3D

. Define R on P((1,2,3]) by ARB iff |A-|B|. Prove that R is an equivalence relation on P( (1,2,3)). 

B. Define R on P({1,2,3}) by ARB iff |A| = |B|. Prove that R is an equivalence relation on P({1,2,3}). %3D

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