1. The problem statement, all variables and given/known data Expand (b^2 + y^2)^(3/2) as a Taylor's series In terms of y/b 2. Relevant equations 3. The attempt at a solution Hello, I'm clueless on this one. I tried to factor out b^3 -> b^3(1 + y^3), but cant figure out what to do next. Thanks in advance.