Problem 1.1: Let set A = {1, 2, 3} and set B = {4, 5}. What is their Cartesian product A×B? [Solution]

Problem 1.2: What is the Cartesian product of the set of real numbers and itself? [Solution]

Problem 1.3: What is the Cartesian product of the set of positive real numbers with itself? [Solution]

Problem 1.4: What is the domain and range of the relation {(2, 4),(4, 8),(8, 16)}? [Solution]

Problem 1.5: What is the domain and range of the relation y = ±

? [Solution]