Rhodes University
Grahamstown 6140, South Africa
Department of Mathematics (Pure & Applied)
E. Andriantiana
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TEL : (046) 603 7444
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E-MAIL :e.andriantiana@ru.ac.za
(Algebra and Analysis (in MAM 2) Assignment 4)
(Due Thursdays 26 August 23:59)
Question 1. For each of the following operations on Z determine (with justification)
if it is associative, and if it has an identity element.
(i) m ? n = mn + 2,
(ii) m ? n = m2 + n.
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