Content / MATH 132-CO3 Busir x WeBWork : Math-132-Elashvili- x *Dashboard X + X C webwork.bridgew.edu/webwork2/Math-132-Elashvili-f23/quiz_mode/Exam_3/?effectiveUser=m5nunes Remaining time: 01:28:44 Problem 3. (15 points) Let f(a) = a - 5x2 + 4x + 6. Find the open intervals on which f is concave up (down). Then determine the r-coordinates of all inflection points of f. 1. f is concave up on the intervals 2. f is concave down on the intervals 3. The inflection points occur at r = 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 a values or the word "none". Note: You can earn partial credit on this problem. preview answers Problem 4. (8 points) Let f() be the function whose graph is shown below