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5 cards from this section. Quick, good the night before a test.
Define a set and provide an example.
Think of a category of items.
Identify whether the set {2, 4, 6} is finite or infinite.
Consider how many elements are present in the set.
What is a set?
Think about the clarity of what is included in a set.
True or False: The empty set is a subset of every set.
Consider how subsets work.
If A = {2, 4, 6} and B = {1, 2, 3, 4}, calculate A ∪ B, A ∩ B, and A - B.
Don't forget to combine all unique elements for union and find shared ones for intersection.
Prove that for any sets A, B, C: A ⊆ B and B ⊆ C implies A ⊆ C.
Use the definitions of subsets to analyze the membership of elements.
6 more questions in this section. Enroll free to practise them all.
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