Question

Write the relation R = {(x, x3): x is a prime number less than 10} in roster form.

Answer 1

R = {(x, x3): x is a prime number less than 10} The prime numbers less than 10 are 2, 3, 5, and 7. 

∴ R = {(2, 8), (3, 27), (5, 125), (7, 343)}