Q)
Some relations are given as \[\]
$R_1$ = {(a, b), (b, c), (a, c), (c, b)} \[\]
$R_2$ = {(1, 2), (2, 5), (6, 6), (3, 4)} \[\]
$R_3$ = {a, p), (b, q), (p, t), (r, t)} \[\]
$R_4$ = {(10, 11), (11, 12), (10, 13)} \[\]
$R_5$ = {(15, 20), (20, 25), (25, 30)}\[\]
Which of the given relations are not functions?
1 Answer
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