Q-1.LetRbe the relation on the setA= {1, 2, 3, 4} defined byaRbif and only if 2a>b+ 1.

a)List the ordered pairs inR.

b)Find the matrix representingR.

Q-7.Suppose that the relationRis defined on the setwhereZaRbmeansa= ±b. Establish whetherRis an equivalence relation giving your justifications.