若<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/297900be0a2f47a3acb28925be5569dc.png?x-oss-process=image/sharpen,200"/>阶矩阵<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/838949495d644198a975a60d5f8c8d1b.png?x-oss-process=image/sharpen,200"/>的任意一行中<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/297900be0a2f47a3acb28925be5569dc.png?x-oss-process=image/sharpen,200"/>个元素的和都是<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/75d52f92b75a4415b426bcd7f78b9201.png?x-oss-process=image/sharpen,200"/>，则<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/838949495d644198a975a60d5f8c8d1b.png?x-oss-process=image/sharpen,200"/>的一个特征值为（）.