If `R` is a relation on the set `A={1,\ 2,\ 3,\ 4,\ 5,\ 6,\ 7,\ 8,\ 9}` given by `x\ R\ yhArry=3x` , then `R=` (a) {(3, 1), (6, 2), (8, 2), (9, 3)} (b) {(3, 1), (6, 2), (9, 3)} (b) {(3, 1), (2, 6), (3, 9) (d) none of these

Answer

d) none of these

Explanation

` { A }={1,2,3,4,5,6,7,8,9} `

x R y` Leftrightarrow y=3 x `

` For x=1, y=3 `

` For x=2, y=6 `

` For x=3, y=9`




Thus, R={(1,3),(2,6),(3,9)}