1. The problem statement, all variables and given/known data find the Maclaurin series and find the interval on which the expansion is valid. f(x) = ln(1-x2 ) 2. Relevant equations 3. The attempt at a solution I'm pretty confident in my skill at problems like these, except for this one I am getting an answer different from the book and I can not see why. I have done similar problems using similar steps and have gotten the correct answers but this one I keep getting something different. the answer in the book is Ʃ 5NxN / N!