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Triangular Matrix

A matrix A of...

Question

A matrix A of order 3 × 3 is such that |A| = 4. Find the value of |2 A|.

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Solution

$|K A| = K^{n} |A| Here, n is the order of A . Given : |A| = 4 \Rightarrow |2 A| = 2^{3} \times 4 = 32$

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