Find the open intervals on which f is increasing and decreasing.
Let f(x)= 2-(2/x)+(6/x2). Find the open intervals on which f is increasing (decreasing). Then determine the x-coordinates of all relative maxima (minima).
1. f is increasing on the intervals?
2. f is decreasing on the intervals?
3. the relative maxima of f occur at x=
4. the relative minima of f occur at x=