<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/775aed607639497bbc87936240d8d87f.png?x-oss-process=image/sharpen,200"/>为n阶方阵，且<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/e178e10e6d434fa195c309d221db02ee.png?x-oss-process=image/sharpen,200"/>，则<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/b4ed3e1443b54709b897af2a586b90e8.png?x-oss-process=image/sharpen,200"/>=