Hey all. We never covered the Maclaurin series (covered Taylor) but these questions are on my review for my final. 1. The problem statement, all variables and given/known data Compute the 9th derivative of: arctan((x^3)/2) at x=0 f^9(0)=? 2. Relevant equations Use the MacLaurin series for f(x) 3. The attempt at a solution atan(x) =x-x^3/3 + x^5/5 +........ I have no idea where to even go from here. I have a similar yet more difficult problem as well that I don't even no where to begin: Compute the 6th derivative of: (cos(6x^2)-1)/(x^2) at x=0 f^6(0)=? Sorry my professor doesn't have office hours till next week and I'm just really frustrated with these!!