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Let * be the binary operation on N defined by a * b = H.C.F. of a and b . Is * commutative? Is * associative? Does there exist identity for this binary operation on N ?

Answer» Let * be the binary operation on N defined by a * b = H.C.F. of a and b . Is * commutative? Is * associative? Does there exist identity for this binary operation on N ?


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