Question

What is proper set and improper set?​

Answer 1

Answer:

The difference of two sets, written A - B is the set of all elements of A that are not elements of B. The difference operation, along with union and intersection, is an important and fundamental set theory operation.

Answer 2

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A proper subset is one that contains few elements of the original set whereas an improper subset, contains every element of the original set along with the null set.