1) let f(x)=6x+6/x. find the open intervals on which f is increasing (decreasing). then determine the x-coordinates of all relative maxima (minima).

let f(x)=6−4/x+2/x^2. find the open intervals on which f is increasing (decreasing). then determine the x-coordinates of all relative maxima (minima).

let f(x)=(8x^2)/(x−4). find the open intervals on which f is increasing (decreasing). then determine the x-coordinates of all relative maxima (minima).

let f(x)=6(x−2)^(2/3) +4. find the open intervals on which f is increasing (decreasing). then determine the x-coordinates of all relative maxima (minima).

let f(x)=8√x −6x for x> 0. find the open intervals on which f is increasing (decreasing). then determine the x-coordinates of all relative maxima (minima).