Let A and B be sets with jAj D 10 and jBj D 7. What can we say about jA [ Bj In
Chapter 12, Problem 12.3(choose chapter or problem)
Let A and B be sets with jAj D 10 and jBj D 7. What can we say about jA [ Bj? In particular, find two numbers x and y for which we can be sure that x jA [ Bj y and then find specific sets A and B so that jA [ Bj D x and another pair of sets so that jA [ Bj D y. Finally, answer the same question about jA \ Bj (find upper and lower bounds as well as examples to show that your bounds are tight).
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