Find the intervals on which the graph of f is concave upward, the intervals on which the graph of f is concave downward, and the inection points. f(x) = x22 + 4x2 E For what interval(s) of x is the graph of f concave upward? Select the correct choice below and, if necessary. ll in the answer box to complete your choice. {9} A. El (Type your answer in interval notation. Type an exact answer. Use a comma to separate answers as needed.) {:3 B. The graph is never concave upward. Find the intervals on which the graph of f is concave upward, the intervals on which the graph of f is concave downward, and the inflection points. f(x) = - x0 + 24x3 - 24x + 19 . . . For what interval(s) of x is the graph of f concave upward? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. (Type your answer in interval notation. Type an exact answer. Use a comma to separate answers as needed.) O B. The graph is never concave upward