Each object in a set is called an element of the set. Two sets are equal if they have exactly the same elements in them. A set that contains no elements is called a null set or an empty set. If every element in Set A is also in Set B, then Set A is a subset of Set B.
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Answer:
Each object in a set is called an element of the set. Two sets are equal if they have exactly the same elements in them. A set that contains no elements is called a null set or an empty set. If every element in Set A is also in Set B, then Set A is a subset of Set B.