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设A为3阶方阵，且已知|-2A|=2，则|A|=()

高老师2年前 (2024-03-26)线性代数（经管类）(04184)9

设A为3阶方阵，且已知|-2A|=2，则|A|=()

A.-1

B.-(1/4)

C.1/4

D.1

正确答案是B

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