Decide which of the following are true. Choose all that apply. Review intersections and unions here. (1,4, 9) n (1, 2, 3, 4) = {1, 4) (a, b, c) U (c, d, e, f} = (a, b, c, d, e, f} □ Øula, n, t) = {a, n, t} D Øn{a,n,t}={a,n,t} {1, 2, 3) U (2, 3, 4) = {1, 2, 3, 2, 3, 4)

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