State the reason for the relation R on the set {1, 2, 3} given by R = {(1, 2), (2, 1)} not to be transitive.
Given set {1,2,3} and relation R = {(1, 2), (2, 1)}.
For relation R to be transitive:
R={(1,2),(2,3),(1,3)}
But in the given relation:
⇒ (2,3) and (1,3) ∉ R
Hence, Given Relation R is not transitive.