bWork > WebWork K 4.3Fall2020: Problem 6 Previous Problem Problem List Next Problem (4 points) Consider the function f(x) = x2efx. For this function there are three important intervals: (-co, A], [A, B], and [B, co) where A and B are the critical numbers. Find A and B For each of the following intervals, tell whether f (x) is increasing (type in INC) or decreasing (type in DEC). (-00, A]: [A, B]: [B, CO) Note: You can earn partial credit on this problem. Preview My Answers Submit Answers