If A is any square matrix of order 3 Γ 3 such that |A| = 3, then the value of |adj A| is ?Β
(a) 3 Β Β Β Β Β Β Β (b) 1/3Β (c) 9Β Β Β Β Β Β Β Β Β (d) 27
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CBSE Class 12 Sample Paper for 2020 Boards
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CBSE Class 12 Sample Paper for 2020 Boards
Last updated at March 23, 2023 by Teachoo
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Question 1 If A is any square matrix of order 3 Γ 3 such that |π΄| = 3, then the value of |πππ π΄| is ? (a) 3 (b) 1/3 (c) 9 (d) 27 We know that |πππ π΄| = |A|^(πβ1) where n is the order of determinant Given Order = n = 3 So, |πππ π΄| = |A|^(3β1) |πππ π΄| = |A|^2 |πππ π΄| = 32, |ππ π π¨| = 9 So, correct answer is (c) - 9 1 mark