8,9,10

8. [-74.16 Points] DETAILS LARCALC9 3.4.012. Determine the open intervals on which the graph is concave upward or concave downward. x2 f(x) = x2 + 9 Concave upward: 0 (--, - V3) (V3,60) 0 (-V3, V3) o(-6, -73) 0 (-00,00) O none of these Concave downward: 0 (-0, - V3) (V3,00) 0 (-13, 13) 0 (-0, - v3) O (-0,00) O none of these Submit Answer
9. [-14.16 Points] DETAILS LARCALC9 3.4.013. Determine the open intervals on which the graph is concave upward or concave downward. x2 + 1 f (x) x2 4. Concave upward: O (-2, 2) (-0,00) O (-3, -2) U (2, …) O (-0, -2) O none of these Concave downward: O (-0, -2) O (-2, 2) 0 (-00, -2) U (2,0) (-0,00) none of these
10. [-74.16 Points] DETAILS LARCALC9 3.4.018. Determine the open intervals on which the graph is concave upward or concave downward. 2 y = 8x + (-1, 1) sin(x)' Concave upward: O (-1,0) 0 (0, 2) 0 (0, 1) O (2, ) none of these Concave downward: O (-1,0) (0, 2) (0, 1) O (2, 1) O none of these