two question

retry this question below Consider the function f(x) = 12x + 60x4 - 100x3 + 7. f(x) has inflection points at (reading from left to right) x = b, E, and F where D is and E is and F is For each of the following intervals, tell whether f(x) is concave up or concave down. ( - oo, D): Concave Down (D, E): Concave Up Question 10 0.67/1 pt 98-100 99 @ Details Score on last try: 0.67 of 1 pts. See Details for more. Get a similar question You can retry this question below Consider the function f(x) = 4x + 6x 1. For this function there are four important intervals: ( - oo, A], [A, B), (B, C], and [C, co) where A, and C are the critical numbers and the function is not defined at B. Find A and B and C For each of the following open intervals, tell whether f(x) is increasing or decreasing. ( - 00, A): Increasing