Question #44546
Prove that if A and B are any two sets such that A ⊆ B, then A ∪ B = B
i) by direct method;
ii) by proving its contrapositive;
iii) by contradiction.
i) by direct method;
ii) by proving its contrapositive;
iii) by contradiction.
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#333702 on Dec 2022
#333702 on Dec 2022
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