how to find x using Newton Raphson in matlab

How can i get the final value of x using Newton Raphson method in MATLAB i) f(x) = 8e^-xsin(x)-1 ii) f(x) = e^-x(x^2-5x+2)-3

the program should print the final x value obtained along with the true and approximate errors

Answer 1

[Ayush Kumar Jaiswal]

% give initial guess

x(1)=initial_guess;

% specify number of iterations

num_itr = 5;

for i=1:length(num_itr)

f(i)=8*e^-x(i)*sin(x(i))-1;

df(i)=-8*e^(-x(i) sin (x(i))) (x(i) cos(x(i)) + sin(x(i)));

x(i+1)=x(i)-(f(i)/df(i));

end

x(end);