A、<img width="70" height="20" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/216434b9-3ac6-42c9-842e-d2739ccd7a55.png" />
B、<img width="67" height="20" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/ba018177-97b7-4466-8809-b3deb5b71b8d.png" />
C、<img width="67" height="20" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/7f2937a6-ae76-4dd6-b79c-af2a6f1f6032.png" />
D、<img width="64" height="19" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/72c33914-4564-4d0b-bd36-ad186083a8a0.png" />
查看答案
为3阶矩阵，将
，再将
倍加到第2列得
，记
，则（ ）。