<p>设A是3阶方阵，且<img alt="" width="81" height="41" src="https://learnfile.20230611.cn/learnAppQuestion/56/e2/56e28820ebff159633d9ab71b66668f5.png" style="width: 100%;height: auto;">，则<img alt="" width="60" height="25" src="https://learnfile.20230611.cn/l