If I is a 2 × 2 identity matrix, find the determinant of the matrix.
A
1
B
2
C
-1
D
0
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
The 2×2 identity matrix is \(I_2 = \begin{pmatrix} 1 & 0 \\0 & 1 \end{pmatrix}\)
Determinant = (1)(1) - (0)(0) = 1.
Source: WAEC / JAMB / NECO Classroom Archive (Record #74152)