[anbcjys]

x0=2;
t=1;
i=0;
format long;
while abs(t)>(1e-10)
x1=x0-(x0^3-3*x0-1)/(3*x0^2-3)
i=i+1;
t=x1-x0;
x0=x1;
y=x1;
k=i
end