正規方程式

\(
\left(
\begin{array}{ccc}
\sum_{i=1}^Nx_i^{2n} & \sum_{i=1}^Nx_i^{2n-1} & \dotsc & \sum_{i=1}^Nx_i^n\\
\sum_{i=1}^Nx_i^{2n-1} & \sum_{i=1}^Nx_i^{2n-2} & \dotsc & \sum_{i=1}^Nx_i^{n-1}\\
\vdots & \vdots & \ddots & \vdots \\
\sum_{i=1}^Nx_i^n & \sum_{i=1}^Nx_i^{n-1} & \dotsc & \sum_{i=1}^N1

\end{array}\right)
\left(\begin{array}{cc}
b_0 \\
b_1 \\
\vdots \\
b_n
\end{array}\right)
=
\left(\begin{array}{cc}
\sum_{i=1}^Nx_i^ny_i \\
\sum_{i=1}^Nx_i^{n-1}y_i \\
\vdots \\
\sum_{i=1}^Ny_i
\end{array}\right)
\)