CBSE Class 12 Sample Paper for 2023 Boards

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Question 2 - CBSE Class 12 Sample Paper for 2023 Boards - Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Last updated at August 12, 2026 by

If A is a square matrix of order 3, |A′|=-3, then |AA′|=

(a) 9  

(b) -9  

(c) 3  

(d) -3

 

[Sample Paper] If A is a square matrix of order 3, |𝐴′| = −3, then - CBSE Class 12 Sample Paper for 2023 Boards

 

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Transcript

Question 2 If A is a square matrix of order 3, |𝐴′|=−3, then |𝐴𝐴′|= (a) 9 (b) -9 (c) 3 (d) -3We know that |𝑨′|=|𝐀|= −3 Now, |𝑨𝑨′|=|𝐴| ×|𝐴^′ | = −3 × −3 = 9 So, the correct answer is (a)

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