Does there exists some simple criteria to know when the primitive of a rational function of
In fact my question is more about the stability of this property. Let P and Q two co' polynomials and let A and B two co' polynomials such that
Then considering a pertubation
The process by which we determine limits of rational functions applies equally well to ratios containing noninteger or negative powers of x: Divide numerator and denominator by the highest power of x in the denominator and proceed from there. Find the limits.