Question: Consider two sets; A ={a1, a2, a3}, B = {b1, b2} together with the relation built R from A to B as {(a1, b1), (a2,

Consider two sets; A ={a1, a2, a3}, B = {b1, b2} together with the relation built R from A to B as {(a1, b1), (a2, b2)}. Is R a relation on A? Briefly explain.

(The key is; No with the reason ''because a relation on a set maps a set to itself.'' But, it is not clear enough.)

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