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If A is a square matrix of order 3 and |A| = 3, then the value of |3 A'| is |
9 -9 81 -81 |
81 |
The correct answer is Option (3) → 81 $|A| = 3,\;\; \text{order of } A = 3$ $|A'| = |A| = 3$ $|3A'| = 3^3 |A'|$ $= 27 \times 3$ $= 81$ The value of $|3A'|$ is $81$. |
