Check whether the following relations are functions or not:
`R_(1)={(2,1),(5,1),(8,1),(11,1),(14,1),(17,1)}`
`(ii) R_(2)={(2,1),(4,2),(6,3),(8,4),(10,5),(12,6),(14,7)}`
`R_(3)={(1,3),(1,5),(2,5)}`

Answer

N/a

Explanation

(i) The first elements of any two order pairs of `R_(1)` are not same, therefore `R_(1)` is a function .
(ii) The first elements of any two order pairs of `R_(2)` are not same, therefore `R_(2)` is a function
(iii) The first elements of order pairs (1,3) and (1,5) are same, therefore, `R_(3)` is not a function.