9Tu: Problem 7 Previous Problem Problem List Next Problem (1 point) For the function f (x) = -2x + sin(x), find all intervals where the function is increasing. f is increasing on (Give your answer as an interval or a list of intervals, e.g., (-infinity,8] or (1,5),(7,10) . Enter none if there are no such intervals.) Similarly, find all intervals where the function is decreasing: f is decreasing on (Give your answer as an interval or a list of intervals, e.g., (-infinity,8] or (1,5),(7,10) . Enter none if there are no such intervals.) Finally, find all critical points in the graph of f (x) (enter x values as a comma-separated list, or none if there are no critical points): Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining