1. The problem statement, all variables and given/known data (a) Find the intervals on which is increasing or decreasing. (b) Find the local maximum and minimum values of . (c) Find the intervals of concavity and the inflection points. F=x2/(x2+3 3. The attempt at a solution a) f ' =6x/(x2+3)2 6x=0 => x=0 What concluusion can I draw from this data about increase/decrease? I am asking because my function actually does not go below y=0, so I thought that it does not decrease at all. My answer is that f is only increasing on intervals for which f'(x) > 0. b) local minimum is at (0,0). no local maximum. c) inflection points: x=+-1. Stuck with concavity!!