fourth order aproximation for second order derivative

Objective: 00 clear all close all clc x=pi/3; dx=linspace(pi/30,pi/300,20); %function is, f(x)=exp(x)*cos(x) %analytical_solution for second order derivative analytical_solution=-2*exp(x)*sin(x); %numerical_solution for fds(forword difference scheme) %after solve equation=(2.9167*f(i)-8.6667*f(i+1)+9.5*f(i+2)-4.6667*f(i+3)+0.9167*f(i+4))…