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7. [-/2 Points] DETAILS LARCALC11 3.4.011. Determine the open intervals on which the graph is concave upward or concave downward. (Enter your answers using interval

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7. [-/2 Points] DETAILS LARCALC11 3.4.011. Determine the open 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.) Rx) =_ 3x + 2 concave upward concave downward Need Help? Read It 8. [-/2 Points] DETAILS LARCALC11 3.4.015. Determine the open 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.) y = 5x - 8 tan X, concave upward concave downward Need Help? Read It Watch it 9. [-/2 Points] DETAILS LARCALC11 3.4.016. Determine the open 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.) y = 9x + - sin x (-1, IT) concave upward concave downward Need Help? Read It Watch It

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