Question

let X={a,b,c,d}. show that R={(a,a),(b,b),(c,c),(d,d),(a,b),(b,a)} is an equivalence relation in X.

Answer 1

what do you not understand?

Answer 2

I get that it is equivalent, but i dont know how i am suppose to show that.

Answer 3

Do you know the definition of equivalence relation? There's three properties. Prove each of those properties hold for this relation.