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+1 vote
1.1k views
in Applications of Matrices and Determinants by (48.7k points)
closed by

If A is a square matrix of order n, then |adj A| is ……. 

(a) |A|2

(b) |A|n 

(c) |A|n - 1 

(d) |A|

1 Answer

+1 vote
by (49.4k points)
selected by
 
Best answer

(c) |A|n - 1 

When A is square matrix of order 3, then |adj A| = |A|2 = |A|3 - 1 

∴ When A is a square matrix of order n, |adj A| = |A|n - 1

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