Question: Determine the pen intervals on which the graph is concave upward or concave downward. (Enter your answers using interval notation. If an answer does

Determine the pen intervals on which the graph is concave upward or

Determine the pen intervals on which the graph is concave upward or concave downward. (Enter your answers using interval notation. If an answer does not exist, enter DNE.) f(x) = x4 - 9x3 concave upward (-00,00) X concave downward 72 (0,9/12) Need Help? Read It Watch It

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