Let A = (1, 2, 3, 4) and R = {(1, 1), (2, 2), (3, 3), (4, 4), (1, 2), (1, 3), (3, 2)}. Show that R is reflexive and transitive but not symmetric.

Given that, A = {1, 2, 3} and R = {1, 1), (2, 2), (3, 3), (4, 4), (1, 2), (1, 3), (3, 2)}.


Now,


R is reflexive (1,1),(2,2),(3,3),(4,4) R


R is not symmetric (1,2),(1,3),(3,2) R but (2,1),(3,1),(2,3) R


R is transitive (1,3) R and (3,2) R (1,2) R


Thus, R is reflexive and transitive but not symmetric.


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