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If A is a square matrix of order 3 and |A| = 5, then |𝑎𝑑𝑗𝐴| =

Class 12th Mathematics, Question - If A is a square matrix of order 3 and |A| = 5, then |𝑎𝑑𝑗𝐴| =

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February 17, 2023

These are the options for the question : If A is a square matrix of order 3 and |A| = 5, then |𝑎𝑑𝑗𝐴| =

(a) 5 (b) 25 (c) 125 (d) 1/5

The correct answer is -(b) |𝑎𝑑𝑗𝐴| = |𝐴|n-1 ⟹ |𝑎𝑑𝑗𝐴| = 25

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