Question

Find A union B.
A: {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
B: {−2, −1, 1, 4, 7, 11}

{−2, −1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}

{1, 4, 7, 11}

{−2, −1, 1, 4, 7, 11}

{ }

Answer 1

the first choice is correct

Answer 2

because it contains all the elements that are in A and B ( no duplicates)