Question

A proper subset (A union B) prove that​

Answer 1

Step-by-step explanation:

To show that A is a subset of B it is enough to show that any element in A is in B. Let a be any element in A. Then a will be in A union B. ... Since the element is arbitrary, every element of A is in B.

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Answer 2

Answer:

To show that A is a subset of B it is enough to show that any element in A is in B. Let a be any element in A. Then a will be in A union B......Since the element is arbitrary, every element of A is in B.