<p>设3阶矩阵<img alt="" width="121" height="161" class="w-e-selected" src="https://learnfile.20230611.cn/learnAppQuestion/ed/ab/edab86002658a64fd46bd98ce5ccae30.png" style="width: 100%;height: auto;">，则<img alt="" width="27" height="33" src="https://lear