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.

Expert Reply
Mon June 25, 2012
Please ask one question at a time. The answer to your first question is given below:
Mon July 17, 2017

plz.. solve Q10

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