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}

Answer 1

\[\LARGE A\cup B=\{ -2,-1,1,2,3,4,5,6,7,8,9,10,11,12\}\]

Answer 2

AUB it means all elements in A and all elements in B ... BUT you can't write them two times... only once !