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For each rational number q, let qZ = {qm| m is an element of Z}, so that we have qZ is a subset of Q.
(a) Use enumeration to describe the sets (1/2)Z, (1/3)Z, (1/2)Z intersects (1/3)Z, (1/2)Z union (1/3)Z, (1/2)Z (1/3)Z, and (3Z)^C (where the compliment is taken inside Z).
(b) What is the smallest natural number n such that every set from part (a) is contained in (1/n)Z?
Z stands for integers and Q stands for rational numbers.
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