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On a set of natural numbers let R be the...

 On a set of natural numbers let R be the relation defined by aRb if a + 2b = 15. Write down the relation by listing all the pairs. Check whether it is reflexive, symmetric, transitive, equivalence.

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(1,7)(3,6) (5,5) (7,4) (9, 3) (11, 2) (13, 1) not reflexive, not symmetric, not transitive, not equivalence)
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