Question

the set containing all the elements of set a or set b or both sets is called the of set a and b​

Answer 1

Answer:

The symbol ∪ is employed to denote the union of two sets. Thus, the set A ∪ B—read “A union B” or “the union of A and B”—is defined as the set that consists of all elements belonging to either set A or set B (or both).

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Answer 2

From the given question the correct answer is:

If set A and set B are two sets, then A union B is the set that contains all the elements of set A and set B. It is denoted as A ∪ B. Example: Set A = {1,2,3} and B = {4,5,6}, then A union B is: A ∪ B = {1,2,3,4,5,6}