<p>设<img src="https://file.gaojiufeng.cn/learnAppQuestion/3f/06/3f066445e7b95cba2558de55dc85bc87.jpg" style="width: 100%;height: auto;">是4阶方阵，且<img src="https://file.gaojiufeng.cn/learnAppQuestion/cb/12/cb1210cf345408edb158be676f2f2167.jpg" style="width: 100%;height: auto;">，则<img src="https://file.gaojiufeng.cn/learnAppQuestion/6f/17/6f17b669bd3b68696ac890b71da72a8f.jpg" style="width: 100%;height: auto;">等于（）.</p>