Question: es 3110 and 3210, either prove the statement or give a counterexample. 31. Every binary operation on a set consisting of a single element is

es 3110 and 3210, either prove the statement or give a counterexample. 31. Every binary operation on a set consisting of a single element is both commutative and associative. 32. Every commutative binary operation on a set having just two elements is associative

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