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| 1. |
For any two sets A and B, prove that : (i) A cup(AcapB)=A (ii) A cap(A cupB)=A (iii) (A cupB)cap(A capB')=A (iv) A cap B = phi rArr A sube B' (v) A' cup B = U rArr A sube B where U = universal set. |
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