Statements numbered 1, 3, 4, 5, 7, 8, 9 are all true assuming the symbols meaning what I think they mean. For example, I understand A' to mean the set complement of A: they have no elements in common, so their intersection is the empty set.

Statement 2 is false because {1, 2, 3} has 3 elements and (1,2,3,4} has 4: two (finite) sets are only equivalent if they can put into 1-1 correspondence. This can't happen unless they have the same number of elements.

Statement 6 is false because daisy is in the set {rose, lily, daisy} but not in the set {rose, tulip, lily}.

Apr 20th, 2015

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