Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Let A and B be two 3x3 matrices such that AB= I and 
then |adj(Badj(2A))| is equal to
Text Solution
Verified by ExpertsThe correct answer is:
C
AB=i
|adj (B adj (2A)| = |B adj (2A) | 2
= |B| 2 |adj (2A)| 2
= |B| 2 (|2A| 2 ) 2 =|B| 2 (2 6 |A| 2 ) 2
|A|= 
and |AB| = 1 
|A| |B| = 1
|B| = 1
|B| = 8
required value = 64
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