Determine the intervals on which the function f(x) = 1 x + 2/3 4 3 -x - 1 2 - -2x is increasing and the intervals on which it is decreasing. f(x) is increasing for x = (-2, -1) U (1,) and decreasing for x = (-0, -2) U (1, 1). f(x) is increasing for x = (-00, -2) U (1, 1) and decreasing for x = (-2, -1) U (1, ). f(x) is increasing for x = (-00, -2) and decreasing for x = (-2, ). f(x) is increasing for x = (-00, 0) and decreasing for x = (0, 0).