ind 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 28x+ 7 fox)- -x + 28x 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. ОА. (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. For what interval(s) of x is the graph of f concave downward? Select the correct choice below and, if necessary, fill in the answer box to complete your choice ОА. (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 downward. Determine thex coordinates of any inflection points of the graph of f(x). Select the correct choice below and, if necessary, fill in the answer box to complete your che (Type an exact answer. Use a comma to separate answers as needed) O A. X= OB. There are no inflection points. ray Click to select and enter your answer(s). rar O HH nere to search hP fo 144 f7 f6 f5 f4 f3 $

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