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)}