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OpenStudy (anonymous):
If A ⊂ B, then A ∩ B = A ∪ B?
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OpenStudy (anonymous):
A is an element of B means that A and B are a union. it is both in A and in B.
OpenStudy (anonymous):
Between always, sometimes, and never, the answer would be always?
OpenStudy (anonymous):
It's not true by counterexample Let A be the empty set and B ia non-empty set
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