<p>设矩阵<img alt="" width="68" height="44" src="https://learnfile.20230611.cn/learnAppQuestion/b9/c0/b9c06cbd591ab320c0ef450b5bf9bb31.png" style="width: 100%;height: auto;">，则<img alt="" width="22" height="22" src="https://learnfile.20230611.cn/learnAp