If A is a matrix of order 2, and |adj A| = -2, then which of the following statements is true for |A|?
Answer & explanation
Correct answer: option 2
adj A| = \( { |A| }^{ n-1 } \), where n is the order of the matrix
$|adj\, A| =|A|$, $-2 = |A|^{ 1 }$, $|A| = -2$