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1. |
If A=\(\begin{bmatrix}1&3\\2&1\end{bmatrix}\), then ________ |
A. | |2A|=4|A| |
B. | |2A|=2|A| |
C. | |A|=2|A| |
D. | |A|=|4A| |
Answer» B. |2A|=2|A| | |