Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Mathematics Matrices Adjoint and Inverse of a Square Matrix
If A = \(\left[\begin{array}{lll} 2 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 3 \end{array}\right]\) then sum of all the elements of A-1 = _______.
1
6
2
-6
3
0
4
\(\frac{11}{6}\)