设A为3阶方阵且|A|=3,又B=2A-1(2A)-1,则|B|=_____.
设A为3阶方阵且|A|=3,又B=2A-1(2A)-1,则|B|=_____.
【正确答案】:6/8 分析:|B|=|2A-1|(2A)-1|=|2A-1-(1/2)A-1=|(3/2)A-1 |=(3/2)3•|A-1|=27/8×(1/3)=9/8.
Top