CUET Preparation Today
If A is a matrix of order 2, and |adj A| = -2, then which of the following statements is true for |A|? |
|A| will be 2 |A| will be -2. |A| can be 2 and -2 None of these |
|A| will be -2. |
adj A| = \( { |A| }^{ n-1 } \), where n is the order of the matrix $|adj\, A| =|A|$, $-2 = |A|^{ 1 }$, $|A| = -2$ |
