0 votes 0 votes kamboj asked Mar 19, 2017 recategorized Mar 19, 2017 by Sanjay Sharma kamboj 167 views answer comment Share Follow See 1 comment See all 1 1 comment reply Sanjay Sharma commented Mar 19, 2017 i edited by Sanjay Sharma Mar 19, 2017 reply Follow Share Ans is B A group G is Abelian if and only if (ab) −1 = a −1 b −1 for all a, b in G. http://math.bu.edu/people/tkohl/teaching/fall2002/ch2-17.pdf 0 votes 0 votes Please log in or register to add a comment.