<p>设二阶方阵<img src="https://learnfile.20230611.cn/learnAppQuestion/33/eb/33eb80bbc3b54aed89a60eea513f0ef7.jpg" style="width: 100%;height: auto;">则<img src="https://learnfile.20230611.cn/learnAppQuestion/7c/fe/7cfe177eaec9ab426f36beac4c30d88a.jpg" style