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For any sets A and B, prove taht : (i)A cap B' =phi rArr A sub B (ii)A 'cup B =U rArr a sub B. |
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Answer» SOLUTION :(i) `A cap B'=phi rArr A-B = phi rArr A subB` (II) ` A' CUP B =U rArr A cap (A ' cup B) = Acap U rArr (A cap A')cup (A cap B) =A` `rArr phi (A cap B)=A rArr A cap B = A rArr A cub B`. |
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