If A is a singular matrix of order 3, then what will be the value of |adj A|
Answer & explanation
Correct answer: option 3
We know that |adj A| = \( { |A| }^{ n-1 } \) , where n is the order of matrix A.
So, |adj A| = \( { |A| }^{ 3-1 } \) = \( { |A| }^{ 2 } \) = \( { 0 }^{ 2 } \) = 0