You need brackets around the list of numbers where you define n. And you need to have the computation of h in a loop. See if this makes sense:
f = @(x) ((1+x.^2).^(-1));
fprime = @(x) (-2*x)./((1+x.^2).^(2));
n = [11;21;51;101]
h = 10 ./ n
for nIndex = 1 : length(n)
this_n = n(nIndex)
% for this value of n...
% Compute this value of h...
this_h = 10 / this_n
% Now loop over i to compute x...
for i = 1 : this_n
x(i) = -5 + i * this_h
end
end
There are ways to do it without loops (using meshgrid) but they might be too confusing to you so I'm doing the simple, intuitive for loop way.
