Rational function/R/Determine derivative/x^2+x-1 over x^3-x+2/Exercise

Determine the derivative of the function

$f\colon D\longrightarrow \mathbb {R} ,x\longmapsto f(x)={\frac {x^{2}+x-1}{x^{3}-x+2}},$

where ${}D$ is the set where the denominator does not vanish.

Create a solution