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asked ago in Mathematics by (19k points)

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

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answered ago by (21k points)
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Since |2A| = 2n |A| where n is order of matrix A. 

Here |A| = 4 and n = 3 

∴ |2A| = 23 ×4 = 32

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