If A is a matrix of order 4, and |adj A| = 8, then what is the value of |A| ?
Answer & explanation
Correct answer: option 2
|adj A| = \( { |A| }^{ n-1 } \), where n is the order of the matrix
|adj A| = \( { |A| }^{ 4-1 } \)
8 = \( { |A| }^{ 3 } \)
|A| = 2