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CGP EDU Academic Team
Published on: August 14, 2026
Let M be a square matrix of order 3 whose elements are real numbers and
, then the absolute value of Tr (M) is
[Here, adjP denotes adjoint matrix of P and T r (P) denotes trace of matrix P i.e. sum of all principal diagonal elements of matrix P]
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
8
adj(adjM) = |M| n-2 M
order of M is 3
Taking determinant on both the sides |M| 4 = 
|M| = ±6
hence, M= 
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