Question 12 T < > Score on last try: 0.25 of 1 pts. See Details for more. > Next question Let f(x)=3+3x - 1. Calculate the derivative f'(x) = 3x2+6x Get a similar question You can retry this question below Calculate the second derivative f''(x) = 6x+6 Note intervals are entered in the format (-00,5)U(7,00) (these are two infinite intervals). On what interval(s) is f increasing? Increasing: On what interval(s) is f decreasing? Decreasing: On what interval(s) is f concave downward? Concave Down: On what interval(s) is f concave upward? Concave Up: What is the limit as x approaches infinity? Limit is: What is the limit as x approaches negative infinity? Limit is: Sketch the graph and submit with your work. Question Help: Message instructor Submit Question