Matrices & Determinants
Adjoint
Grade 12
Question:
<p>If \(A\) is a \(2 \times 2\) matrix, then adj(adj \(A) equals:</p>
Step-by-Step Solution
Key Concept: For 2 \times 2 matrices, $\text{adj}(\text{adj } $A)$ = $A$.
1. Use identity for $2 \times 2$
2. adj(adj $A) = $A$
Correct Answer: 1