Question

Let Set A be {1, 3, 5, 7, 9}, and let Set B be {0, 2, 4, 6, 8}. Then:

Find the set union of A and B.

Find the set intersection of A and B.

Are A and B disjoint?

(Show your work)

Answer 1

1) A and B = {1, 3, 5, 7, 9, 0, 2, 4, 6, 8}

2) Yes, A and B are disjoint.

Explanation:

The set union of A and B is the set containing all the elements of Set A and Set B. So it would be:

Set A U B = {1, 3, 5, 7, 9, 0, 2, 4, 6, 8}

The set intersection of A and B is the set containing all the elements that are common to both Set A and Set B. So it would be:

Set A ∩ B = {} (empty set)

Yes, A and B are disjoint because they have no elements in common.