<p>设矩阵<img src="https://learnfile.20230611.cn/learnAppQuestion/1e/3c/1e3c4d8b32fe781d125f99b47ce45ab7.jpg" style="width: 100%;height: auto;">则<img src="https://learnfile.20230611.cn/learnAppQuestion/fb/22/fb22fcbde54d7bb2280638d892d606c8.jpg" style="