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5 cards from this section. Quick, good the night before a test.
What is the cardinality of the set {3, 1, 2}?
Count the elements in the set.
Is {x} a singleton set?
Think about the definition of a singleton set.
What does A ∩ B represent?
Look for common elements in both sets.
True or False: The power set of {1, 2} contains 4 elements.
Consider the subsets of a 2-element set.
Given sets A = {1, 2, 3}, B = {3, 4, 5}, and C = {1, 4}, prove that A ∩ (B ∪ C) = (A ∩ B) ∪ (A ∩ C).
Think about the distributive property of sets.
Construct the power set of the set D = {a, b}. List all subsets and explain.
Consider how many subsets you can form from 2 elements.
5 more questions in this section. Enroll free to practise them all.
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