Answer to Question #145985 in Abstract Algebra for Sourav Mondal
Let S be the set of all real numbers except
—1. Define an operation + on S by
x+y=x+y+xy; x,y belongs to S. Show that
< S, +> is an abelian group. Find a solution
of the equation 1+x = 2 in S.
is an abelian group.