% function accepts 2 strings, 1 double and the number of iterations
% a31("func_name","func_derv_name", start, limit)
% functions must be in appropriate form for newton
%
%exp.:
% function y=func(x)
% y=(x^4-x-10);
% end
% function y=func_der(x)
% y=4*x^3-1;
% a33("func","func_der",2,100)
% ans=1.8556
