derivatives

A polynomial ψ(s) = a n s n + a n-1 s n-1 + ......+ a 1 s + a 0 of degree n > 3 with constant real coefficients a n , a n-1 , ... a 0 has triple roots at s = -σ. Which one of the f...

At $$x=0,$$ the function $$f\left( x \right) = {x^3} + 1$$ has