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If two square matrices A and B are such that |AB| = 12 and |B| = −4, then value of |A| is:(a) 8(b) -8(c) -3(d)16 |
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Answer» Correct answer is: (c) -3 |AB| = 12 ⟹ |A| |B| = 12 ⟹ −4|A| = 12 ⟹ |A| = −3 |
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