سلام
این اولی:
\begin{equation}
{\tan ^{ - 1}}(x) = \frac{x}{{1 + \frac{{{1^2}{x^2}}}{{3 + \frac{{{2^2}{x^2}}}{{5 + \frac{{{3^2}{x^2}}}{{7 + \frac{{}}{ \ddots }}}}}}}}}
\end{equation}
اینم دومی:
\begin{equation}
\begin{array}{*{20}{c}}
\begin{array}{c}
{x_0}\\
\\
{x_1}\\
\\
{x_2}\\
\\
\cdots
\end{array}&\begin{array}{c}
f({x_0})\\
\\
f({x_1})\\
\\
f({x_2})\\
\\
\cdots
\end{array}&\begin{array}{c}
\\
{\rho _1}[{x_0},{x_1}]\\
\\
{\rho _1}[{x_1},{x_2}]\\
\\
\cdots \\
\end{array}&\begin{array}{c}
\\
\\
{\rho _2}[{x_0},{x_1},{x_2}]\\
\\
\cdots \\
\\
\end{array}&\begin{array}{c}
\\
\\
\cdots \\
\\
\\
\\
\end{array}
\end{array}
\end{equation}
