JAMB - Mathematics (2025 - No. 15)
If I is a 2 × 2 identity matrix, find the determinant of the matrix.
1
2
-1
0
Paliwanag
The 2×2 identity matrix is \(I_2 = \begin{pmatrix} 1 & 0 \\0 & 1 \end{pmatrix}\)
Determinant = (1)(1) - (0)(0) = 1.
The 2×2 identity matrix is \(I_2 = \begin{pmatrix} 1 & 0 \\0 & 1 \end{pmatrix}\)
Determinant = (1)(1) - (0)(0) = 1.