Mathematics for IGCSE & O level - Sets (Section 2 - No. 46)
If A = {a, b, c} and B = {c, d, e}, what is (A ∪ B)' if the universal set is {a, b, c, d, e, f}?
{a, b, c, d, e}
{f}
{a, b, c, d, e, f}
{}
توضیح
A ∪ B = {a, b, c, d, e}. (A ∪ B)' includes the elements in the universal set but not in A ∪ B, which is {f}.