Answer:
In zone A and zone E.
Explanation:
See the attached graph to this question.
The graph clearly shows that the function is increasing in the portion which is denoted by A and E.
In the A zone, the graph moves from minima towards local maxima and in the E zone, the graph moves from a local minima towards maxima.
In both the zones, the value of f(x) increases as the value of x increases. Therefore, the function is increasing in A and E zone. (Answer)