若n阶矩阵A满足方程A +2A-3E=0,则A =
问题描述:
若n阶矩阵A满足方程A +2A-3E=0,则A =
答
A+2A-3E = 0 ,
3A = 3E ,
A = E .
若n阶矩阵A满足方程A +2A-3E=0,则A =
A+2A-3E = 0 ,
3A = 3E ,
A = E .