Question
If $A_n=\left[\begin{array}{cc}1-n & n \\ n & 1-n\end{array}\right]$, then $\left|A_1\right|+\left|A_2\right|+\ldots .\left|A_{2021}\right|=$
If $A_n=\left[\begin{array}{cc}1-n & n \\ n & 1-n\end{array}\right]$, then $\left|A_1\right|+\left|A_2\right|+\ldots .\left|A_{2021}\right|=$