, the inverse of A is
and I is a unit matrix.
If a, b, c are in A.P. and then f’(x) is :
The set of equations
If x, y, z are integers in AP, lying between 1 and 9, and x51, y41 and z31 are three-digit numbers then the value of
Let p be a non-singular matrix (O denotes the null matrix), then p–1 is ;