1.

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

Answer»

Correct answer is: (c) -3

|AB| = 12

⟹ |A| |B| = 12

⟹ −4|A| = 12

⟹ |A| = −3



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