Question: Let A = { a , b , c , d } and define a relation R on A as follows: R = {( a

Let

A = {a, b, c, d}

and define a relation R on A as follows:

R = {(a, a), (b, b), (b, d), (c, c), (d, b), (d, d)}.

It is a fact that R is an equivalence relation on A. Use set-roster notation to write the equivalence classes of R.[a]=

[b]=

[c]=

[d]=

How many distinct equivalence classes does R have? classesList the distinct equivalence classes of R. (Enter your answer as a comma-separated list of sets.)

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