In Exercises, let U = {1, 2, 3, 4, 5, 6, 7, 8, 9}, A = {1, 2, 4, 6, 8}, B = {2, 4, 5, 9}, C = {x | x is a positive integer and x2 ≤ 16}, and D = {7, 8}.
Exercise
Compute
(a) A − B
(b) B − A
(c) C − D
(d)
(e)
(f)
(g)
(h)
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