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Baddog120

  • one year ago

A universal set contains only sets A and B. If A∩B = Ø and A and B are not the empty set, then all of the following are true except A and B are disjoint. A is equal to B complement. A∪B={} A is not a subset of B.

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  1. PeterPan
    • one year ago
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    Think about it :) In English, A∩B = Ø Just means A and B have no elements in common :)

  2. mathsmind
    • one year ago
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    we may use venn diagrams to prove this or use the common way \[x \in A ...\]

  3. PeterPan
    • one year ago
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    Or, if you want a quicker way, neither A nor B is an empty set, so how can it be that A∪B={} or that there are no elements in A or in B?

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