Assignment8: Problem 11 Previous Problem Problem List Next Problem (1 point) Let f (x) = Find the open intervals on which f is concave up (down). Then determine the x-coordinates of all inflection points of f. 8x 2+ 8 1. { is concave up on the intervals 2. f is concave down on the intervals 3. The inflection points occur at x = Notes: In the first two, your answer should either be a single interval, such as (0,1), a comma separated list of intervals, such as (-inf, 2), (3,4), or the word "none". In the last one, your answer should be a comma separated list of x values or the word "none". Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Email WeBWork TA