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Question

Is the relation R defined on a set A={a,b,c} as follows:
R={(a,a),(a,b),(a,c),(b,b),(b,c),(c,a),(c,b),(c,c)} is (i) reflexive (ii) symmetric (iii) transitive

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Solution

Given the relations on the set A is
iR={(a,a),(a,b),(a,c),(b,b),(b,c),(c,a),(c,b),(c,c)}

This relation is reflexive as for all aA, (a,a)R1.

As (a,b)R but (b,a)R so R not symmetric.

Now (b,c)R,(c,a)R but (b,a)R, so the relation is not transitive.

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