Mathematics · Relations and Functions
Let A be the set {1, 2, 3, 4}. Which ordered pairs are in the relation R = {(a, b): a divides b}?
- 1{(1, 1), (1, 2), (1, 3), (1, 4), (2, 2), (2, 3), (3, 3), (4, 4)}
- 2{(1, 1), (1, 2), (1, 3), (1, 4), (2, 2), (2, 4), (3, 3), (4, 4)}✓
- 3{(1, 1), (1, 2), (1, 3), (1, 4), (2, 2), (2, 3), (3, 1), (4, 4)}
- 4{(1, 1), (1, 2), (1, 3), (1, 4), (2, 3), (2, 4), (3, 3), (4, 4)}
Correct answer
{(1, 1), (1, 2), (1, 3), (1, 4), (2, 2), (2, 4), (3, 3), (4, 4)}
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