Set Operations and Complements (HSC SSCE Mathematics Advanced): Quizzes

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Set Operations and Complements
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What does the intersection ABA \cap B represent?

Elements in both AA and BB

If A={1,2,3}A = \{1, 2, 3\} and B={2,3,4}B = \{2, 3, 4\}, what is ABA \cap B?

{2,3}\{2, 3\}

What does the union ABA \cup B represent?

All elements from AA, BB, or both

If A={1,2,3}A = \{1, 2, 3\} and B={2,3,4}B = \{2, 3, 4\}, what is ABA \cup B?

{1,2,3,4}\{1, 2, 3, 4\}

When are two sets AA and BB disjoint?

When AB=A \cap B = \varnothing

Are sets A={1,3,5}A = \{1, 3, 5\} and B={2,4,6}B = \{2, 4, 6\} disjoint?

Yes, they have no common elements

If U={1,2,3,4,5,6}U = \{1, 2, 3, 4, 5, 6\} and A={1,3,5}A = \{1, 3, 5\}, what is A\overline{A}?

{2,4,6}\{2, 4, 6\}

How should you think of the intersection operation?

As "AND" - element must be in both sets

How should you think of the union operation?

As "OR" - element in either set or both

If A={a,b}A = \{a, b\} and B={c,d}B = \{c, d\}, what is ABA \cap B?

\varnothing

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