2. [0/1 Points] DETAILS PREVIOUS ANSWERS HARMATHAP12 10.2.013. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A function and its graph are given. Use the second derivative to determine each of the following. Check your results against the graph shown. f(x) = _x4 + 1x3 - 3x2 + 9 f(x) 20 15 10 X -8 -6 4 -5 2 4 6 8 -10 -15 -20 Determine intervals on which the function is concave up. (Enter your answer using interval notation.) X Determine intervals on which the function is concave down. (Enter your answer using interval notation.) Locate the points of inflection. (If an answer does not exist, enter DNE.) (x, y) = ( (smaller x-value) ( x, y ) = (larger x-value) Need Help? Read It