Elementary Foundations: An introduction to topics in discrete mathematics

Verify that the relation is an equivalence relation on the set $A\text{.}$

Consider a few example equivalence classes, for the specific example representative elements provided (if applicable). What other elements are in that class?

Devise a general way to describe every equivalence class, using your experience from the example classes already considered (if applicable). Make your class descriptions more meaningful than just “all elements equivalent to a specific representative element.”

List/describe all elements in the quotient $A/\equiv \text{.}$