1. The problem statement, all variables and given/known data If F(x)= 1/(1+x) G(x)= 1/(2+x) determine f(g(x)) 2. Relevant equations No equations for composition functions 3. The attempt at a solution F(g(x)) = 1/1+ 1/(2+x) Then do you try to eliminate the fraction in the denominator by multiplying it by (2+x)? They said that the x values that would not work are -3,-2,-1. I understand where they got -3 and -2 but where did they get -1?