<p>设<img src="https://file.gaojiufeng.cn/learnAppQuestion/e8/b8/e8b8fe826117c79760e7af4cb21b6138.jpg" style="width: 100%;height: auto;">为<img src="https://file.gaojiufeng.cn/learnAppQuestion/9c/d3/9cd3e69f3625ebece354fa2cc11e92eb.jpg" style="width: 100%;height: auto;">阶矩阵，且<img src="https://file.gaojiufeng.cn/learnAppQuestion/57/de/57de25ba953f005ef65408e1ee18182d.jpg" style="width: 100%;height: auto;">，则必有()</p>