Matrices & Determinants
Inverse of a matrix
Grade 12
Question:
<p>If \(A\) is identity matrix, then det(A\)^{-1}) equals:</p>
<p>(A) 1</p>
<p>(B) 0</p>
<p>(C) -1</p>
<p>(D) cannot be determined</p>
Step-by-Step Solution
Key Concept: Inverse of identity is identity.
1. $I$^{-1} = $I$
2. $\det(I)$=1
Correct Answer: 1