public static Polynomial AsPolynomial(this RationalFraction f)
{
if (f.Denom.Degree > 0)
{
throw new Exception(String.Format("{0} cannot be converted to polynomial !", f));
}
return(f.Num * (1.0 / f.Denom.Coeffs[0]));
}
public static RationalFraction Derivative(this RationalFraction f)
{
return((f.Num.Derivative() * f.Denom - f.Num * f.Denom.Derivative()) / (RationalFraction)(f.Denom * f.Denom));
}
public static double Eval(this RationalFraction f, double x)
{
return(f.Num.Eval(x) / f.Denom.Eval(x));
}