Q4-a: Suppose a, d EN -> Nature number Define wheat it means to say that d divides a. b) Prove that if dza and d/3a, then d/a C) Find all de N Such that d/24 but d730. d) Let R be the relation on № defined by aRb it alb.IS R&reflexive? Symmetric? Transitive? e) let R be the relawon on N defined by ab if gcd (a,b) = 10 IS R reflexive? Symmetrie? Transitive?

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