Given that A is a square matrix of order 3×3 and |A| = -4. Find |adj A|
Last updated at Oct. 26, 2020 by Teachoo
Transcript
Question 5 (Choice 2) Given that A is a square matrix of order 3 ร 3 and |A| = โ4. Find |adj A| We know that |๐๐ ๐ ๐จ| = |๐จ|^(๐โ๐) where n is the order of determinant Given Order = n = 3 So, |๐๐๐ ๐ด| = |A|^(3โ1) |๐๐๐ ๐ด| = |A|^2 |๐๐๐ ๐ด| = (โ4)2 |๐๐ ๐ ๐จ| = 16
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CBSE Class 12 Sample Paper for 2021 Boards
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