A formula of order 4 for approximating the first derivative of a function f gives: f'(0) 4.50557 for h = 1 f'(0) = 2.09702 for h = 0.5 By using Richardson's extrapolation on the above values, a better approximation of f'(0) is: 0.17095 This option 1.00177 This option 0.97318 1.93645