1. The problem statement, all variables and given/known data How may I find stationary points, increase/decrease intervals, concavity for f(x)=(x^3-2x^2+x-2)/(x^2-1)? 2. Relevant equations 3. The attempt at a solution I am familiar with how it should be done, except that here I get f'(x)=x^4-4x^2+8x-1 for the numerator of the derivative and am unable to figure out how to find extrema. I'd appreciate some advice.