Mathematics for IGCSE & O level - Sets (Section 3 - No. 25)
If A = {1, 2, 3, 4, 5} and B = {5, 6, 7}, what is A ∪ B?
{5}
{1, 2, 3, 4, 5, 6, 7}
{1, 2, 3, 4}
{6, 7}
説明
A ∪ B represents the union of sets A and B. Combine elements from both sets without repetition.