设<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/838949495d644198a975a60d5f8c8d1b.png?x-oss-process=image/sharpen,200"/>是<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/47b39c0ce05b411a9de97f81bf090ab6.png?x-oss-process=image/sharpen,200"/>矩阵，<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/89e0e4e051354696b4e5c9ff03db9422.png?x-oss-process=image/sharpen,200"/>. 若以<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/838949495d644198a975a60d5f8c8d1b.png?x-oss-process=image/sharpen,200"/>为系数矩阵的齐次线性方程组只有零解，则必有（）.