Answer:
There is an interval outside which the behaviour is trivial, either iterates ... From the texts on global behaviour we have found that if the function has ... because −1 ≤ cos(x) ≤ 1 we get 0 ≤ f′(x) ≤ 1/2 from which follows that zero is a global ... extrema of f′ we calculate the derivative f′′(x)=2x(6 − x2)/(2 + x2)3 which.
