the intervals on which the following function is concave up or concave down identity any inflection points f(x)=-5x4 + 10x3-15 are concave up or concave down Select the corect choice below andé ¾in the answer box(es) to complete yor choice (Smplify your answer Type your answer in interval notation Use a comma to separate answers as needed) The function is concave down onâ¡ard concave up onâ¡ O B. The function s concave down on O C. The tunction s concave up on Locate any infection points of 1 Select the correct choice below and, t necessary, ilin the answer box to complete your choice O Aã An inflection point occurs at x- 0 B. There are no infection points for t â ¢(Use a comma to separate answers as needed )