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Mathematics, 17.10.2021 16:50 mfweldon64

cho A là một ma trận vuông cấp 3 có det (A) = 3 và A^{-1} = \frac{1}{det (A)}×B. Tính det (B^{2})

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cho A là một ma trận vuông cấp 3 có det (A) = 3 và = ×B. Tính det ()...
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