Problem 10. (1 point) Use the definition of a derivative to find f' (0) where: Problem 14. (1 point) f ( x ) = 2 sin ( 1) & #0 NOTE: Do this problem after we've covered the chain rule in 0 *=0 class. If the derivative does not exist enter DNE. If f (x) = 3xsin (x). f ( x ) = f'(0)= NOTE: sin '(x) = arcsin(x), not Six Problem 11. (1 point) Problem 15. (1 point) Let Find the derivative of f (x) = ((x) = 3x cos(x) f ( x ) = 1 ( x ) =