Q5 of 43 Page 1

Let A be a square matric of order 3 × 3. Write the value of |2A|, where |A| = 4.

Using the property of determinant –


|kA| = kn|A| where n is the order of determinant.


∵ given order of |A| is 3.


∴ |2A| = |A|


⇒ |2A| = 8 4 = 32


The value of |2A| is 32.


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