<p>设A=<img alt="" width="80" height="77" style="width: 100%;height: auto;" class="w-e-selected" src="https://learnfile.20230611.cn/learnAppQuestion/56/80/5680f7061c804b41a363625f7c11ccd7.png">求<img alt="" width="29" height="31" style="width: 100%;hei