1. The problem statement, all variables and given/known data Problem: Find the value of b for which 2. Relevant equations Power series for (1/1+x) or in this case, power series for (1/1+b) 3. The attempt at a solution I keep getting ln (-5/6) as the answer, but apparently the correct answer is ln (5/6). I do not see why. Please look at my work and tell me what I am doing wrong.