## Given that A is a square matrix of order 3Γ3 and |A| = Β -4. Find |adj A|

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CBSE Class 12 Sample Paper for 2021 Boards

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Class 12

Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Last updated at Oct. 26, 2020 by Teachoo

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Question 5 (Choice 2) Given that A is a square matrix of order 3 Γ 3 and |A| = β4. Find |adj A| We know that |ππ π π¨| = |π¨|^(πβπ) where n is the order of determinant Given Order = n = 3 So, |πππ π΄| = |A|^(3β1) |πππ π΄| = |A|^2 |πππ π΄| = (β4)2 |ππ π π¨| = 16