1. The problem statement, all variables and given/known data 1+(x+1)+(x+1)^2+(x+1)^3 + ..... if lx+1l < 1 2. Relevant equations Sn=a/1-r 3. The attempt at a solution My attempt: so I have a = x+1 and r = x+1 from there i get x+1/1-(x+1) which is x+1/1-x-1 from there x+1/-x multiply by the reciprocal my solution is x^2 + x + 1 with the 1 coming from the original sequence. What do you think?