CUET Preparation Today
If A is a matrix of order 3, and |adj A| = 25, then what is the value of |A|? |
5 -5 Both (a) and (b) None of these |
Both (a) and (b) |
| adj A| = \( { |A| }^{ n-1 } \), where n is the order of the matrix |adj A| = \( { |A| }^{ 3-1 } \) 25 = \( { |A| }^{ 2 } \) |A| = 5 or -5 |
