<p>设矩阵<img src="https://learnfile.20230611.cn/learnAppQuestion/07/77/07770b18b90695ade6e76721956f420f.jpg" style="width: 100%;height: auto;">则<img src="https://learnfile.20230611.cn/learnAppQuestion/b5/23/b523d5c8084793475753962bf1f8c5bd.jpg" style="