(1 point) Let f ( a ) = 7x -4x2 for x

(1 point) Let 7x-4x2 for x < O, 7x2+7x form 20. According to the definition of the derivative, to compute f' (0) , we need to compute the left-hand limit , which is and the right-hand limit , which is We conclude that f' (0) is Note: If a limit or derivative is undefined, enter 'undefined' as your answer.