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If A and B square matrices of order 3 such that $|A|= -1, |B|= 5$, then the value of $|2AB|$ is: |
-40 -10 20 -20 |
-40 |
The correct answer is Option (1) → -40 Given: $|A| = -1$, $|B| = 5$ A and B are square matrices of order 3. Then, using determinant properties: $|2AB| = 2^3 \cdot |A| \cdot |B|$ $= 8 \cdot (-1) \cdot 5 = -40$ |
