Determine if the following binary operators are commutative
     Determine if the following binary operators are commutative: com  
  
  Solution
For commutative, following should be true: a*b = b*a
Now, a*b = 2ab .....(i)
and b*a = 2ba = 2ab.....(ii)
clearly equation (i) is equal to equation (ii) thus, the given binary operator is Commutative.

