2 If R = {(x, y) | x ∈ {1, 2}, y ∈ {3, 4}} is a binary relation, which is a valid ordered pair in R? A (1, 3) B (3, 1) C (1, 1) D (3, 3)
3 What is the domain of the relation R = {(1,2), (2,3), (3,4)}? A {1, 2, 3} B {2, 3, 4} C {1, 2, 3, 4} D {1, 3}
7 Simplify: (x² - 2x - 3)/(x² + x - 12) × (x - 3)/(x + 1) A (x - 3)/(x + 4) B (x + 1)/(x + 4) C (x - 3)/(x - 4) D 1
10 If A = {2, 4, 6, 8} and B = {4, 8, 12}, what is A ∪ B? A {2, 4, 6, 8, 12} B {4, 8} C {2, 6, 12} D {2, 4, 6, 8}