Note If you are asked for value s give your answer as a

Last updated: 10/27/2023

Note If you are asked for value s give your answer as a single value e g 17 or a comma separated list e g 1 2 3 or NONE If you are asked for an interval give your answer in interval notation Type INF for oo and INF for o Consider the function f x x 4 5x 12x 1 and its derivatives f x 3x 9x 12 f x 6x 9 a Determine the x intervals on which f is concave up and concave down f is concave up on f is concave down on b What are the x y coordinates of the inflection points of f Enter your answer as an x y coordinate e g 91 13 and separate multiple answers by commas