Question

The relation R is defined on the set of natural numbers as

{(a, b) :a = 2b}. Then $R ^ { - 1 }$ is given by

• A. {(2, 1), (4, 2), (6, 3).....}
• B. {(1, 2), (2, 4), (3, 6)....}
• C. $R ^ { - 1 }$is not defined
• D. None of these

Answer 1

Answer: (B)

{(1, 2), (2, 4), (3, 6)....}

Answer 2

R = {(2, 1), (4, 2), (6, 3),......} So, $R ^ { - 1 }$ = {(1, 2), (2, 4), (3, 6),.....}.