At first, we sample 
in the 
( is odd) equidistant points around 
:
![\[ f_k = f(x_k),\: x_k = x^*+kh,\: k=-\frac{N-1}{2},\dots,\frac{N-1}{2} \]](https://blog.hoc.io.vn/wp-content/ql-cache/quicklatex.com-ba5d0fab0e07a4362dd6a77cbf5d2e65_l3.png "Rendered by QuickLaTeX.com")
% Chỉ cần dán code tikz ở đây
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My Blog Học
My WordPress Blog
My Blog Học
My WordPress Blog
At first, we sample in the ( is odd) equidistant points around :
% Chỉ cần dán code tikz ở đây
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