Question: A function f is given by the formula
f(x) = (1 + (2/x))√(x + 6)
(a) Find the domain of f and the intervals where f (x) is positive.
(b) Find possible local extreme points.
(c) Examine f (x) as x → 0-, x → 0+, and x → ∞. Also determine the limit of f(x) as x → ∞. Does f have a maximum or a minimum in the domain?