11,12

11. [-14.16 Points] DETAILS LARCALC9 3.4.019. Find the points of inflection of the graph of the function. (If an answer does not exist, enter DNE.) f(x) = 1/ 4x 시 + 2x3 (x, y) = ( (x, y) = ( smaller x-value D) larger x-value Describe the concavity. Concave upward: (-0, -3) U (0,0) 0 (-0, 0) U (3,0) (-3,0) (0, 3) O none of these Concave downward: (-0, -3) U (0,0) O(-0, 0) U (3, …) O(-3,0) O (0, 3) O none of these 12. [-74.24 Points] DETAILS LARCALC9 3.4.021. Find the point of inflection of the graph of the function. (If an answer does not exist, enter DNE.) f(x) = x3 – 6x2 + 14x (x, y) = ( Describe the concavity. Concave upward: O (-0,2) O (-0, -2) (2,00) O (-2, 0) O none of these Concave downward: (-0,2) (-0, -2) O (2,00) O (-2, 0) O none of these