Assume that * is a binary operation on S with identity elements e and that x*(y*z)=(x*z)*y for all x,y,z E S. Prove * is commutative and associative!
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Originally Posted by mandy123 Assume that * is a binary operation on S with identity elements e and that x*(y*z)=(x*z)*y for all x,y,z E S. Prove * is commutative and associative! If you let then . This is commutative. Now . This is associate.
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