1. The problem statement, all variables and given/known data I need to determine if a*b=ab+1 is commutative and associative. * is any arbitrary operation 2. Relevant equations 3. The attempt at a solution a*b=ab+1 is commutative, but not associative. I'm getting stuck in showing why. b*a=ba+1 a*(b*c)=a(b+1) ?????