Thus, we can draw the following conclusions:
is strictly increasing on Also, is strictly decreasing on
has a local maximum at the point and has a local minimum at the point
increases, has a point of inflection at In view of the above, the graph of the function may be sketched as follows:
is strictly increasing on 
is strictly decreasing on 
is strictly concave downward on 
is strictly concave upward on 
has a local maximum at the point 
has a local minimum at the point 
changes its nature from concave downward to concave upward at this point as 
has a point of inflection at 
may be sketched as follows: 
