|(3A)^-1 - 2A*|
=|2∕3 x A*-2A*|
=| - 4∕3 A*|
=| - 4∕3 A*A|x1∕|A|
=|-2∕3E|x2
=(-2∕3)³×2
= -16/27
设A为三阶矩阵,且|A|=二分之一,求|(3A)^-1 - 2A^*|的值.
设A为三阶矩阵,且|A|=二分之一,求|(3A)^-1 - 2A^*|的值.
数学人气:241 ℃时间:2020-04-07 16:39:53
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