Mon June 25, 2012 By: Arvindh Jambunathan

Q4.(a,b)*(c,d)=(a+c,b+d) for all (a,b),(c,d) belongs to A where A=N Union {0}*N Union {0}show that * is commutative & associative. also find identity element. Q5. Find identity element for a*b=a+b+1 in Z. Q6.If a*b=3a+b on Z . check for commutativity & associativity.

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Mon June 25, 2012
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