2. The determinant of matrix \( \mathbf{A} \) is nonzero if and only if the reduced row echelon form of \( \mathbf{A} \) is the identity matrix.
阿摩線上測驗
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阿摩線上測驗
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2. The determinant of matrix \( \mathbf{A} \) is nonzero if and only if the reduced row echelon form of \( \mathbf{A} \) is the identity matrix.