Mathematics for IGCSE & O level - Sets (Section 2 - No. 28)
If U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, A = {1, 2, 3, 4, 5} and B = {5, 6, 7}. Find A' ∪ B
{6, 7, 8, 9, 10}
{5, 6, 7, 8, 9, 10}
{5, 6, 7}
{6, 7, 8, 9, 10, 5}
설명
A' = {6, 7, 8, 9, 10}, therefore, A' ∪ B = {5, 6, 7, 8, 9, 10}