Question

If A is a square matrix of order 3 such that |A|=5.. Write the value of |adj A|

Answer 1

Here,

|A|=5 , |adjA|=? ,n=3

We have,

|adj A|=|A|^n-1, where n is the order of  A.

Therefore,

|adj A|= 5³-¹ = 5² = 25