Write the relation in the Roster form. State its domain and range.R1

1.	Write the relation in the Roster form. State its domain and range.R1 = {(a, a2 ) / a is a prime number less than 15}
Answer» R = {(a, a² ) / a is a prime number less than 15} ∴ a = 2, 3, 5, 7, 11, 13 ∴ a = 4, 9, 25, 49, 121, 169 ∴ R = {(2, 4), (3, 9), (5, 25), (7, 49), (11, 121), (13, 169)} ∴ Domain (R₁) = {a/a is a prime number less than 15} = {2, 3, 5, 7, 11, 13} Range (R₁ ) = {a /a is a prime number less than 15} = {4, 9, 25, 49, 121, 169}

Write the relation in the Roster form. State its domain and range.R1 = {(a, a2 ) / a is a prime number less than 15}

Answer»

R = {(a, a² ) / a is a prime number less than 15}

∴ a = 2, 3, 5, 7, 11, 13

∴ a = 4, 9, 25, 49, 121, 169

∴ R = {(2, 4), (3, 9), (5, 25), (7, 49), (11, 121), (13, 169)}

∴ Domain (R₁) = {a/a is a prime number less than 15}

= {2, 3, 5, 7, 11, 13}

Range (R₁ ) = {a /a is a prime number less than 15}

= {4, 9, 25, 49, 121, 169}