defence exam Army Havildar SAC Mock Test Series 2025 Mathematics Matrices Adjoint and Inverse of a Square Matrix
If P is an invertible matrix, then incorrect statement is -
1
If P is a diagonal matrix, then P-1 is also diagonal matrix.
2
If P is a symmetric matrix, then P-1 will also be symmetric.
3
If P is scalar matrix, then P-1 will also be scalar.
4
If |P| = 6, then |P-1| = 6