设A=
(12
35)
,则A-1=_____.
设A=
(12
35)
,则A-1=_____.
【正确答案】:(-5 2 3 -1) 分析:A-1=1/|A| (A11 A21 A12 A22) =- (5 -2 -3 1) = (-5 2 3 -1)
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