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The union of two or more sets is a set containing all of the members in those sets. For example, the union of sets with members 1, 2, 3, and a set with members 3, 4, 5 is the set with members 1, 2, 3, 4, 5. So we can write:

Let A = {1. 2. 3} and B = {3, 4, 5}, then

A∪B = {1, 2, 3, 4, 5}

The intersection of two or more sets is the set containing only the members contained in every set. For example, the intersection of a set with members 1, 2, 3, and a set with members 3, 4, 5 is the set with only member 3. So we can write:

Let A = {1. 2. 3} and B = {3, 4, 5}, then

AB = {3}

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Q: Explain union and intersection of sets?
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