The set of equations
For no value of
Determinant of coefficients
and this is positive for all .
The only solution is therefore the trivial solution.
Then the value of α is
If be the complex cube roor of unity and , then A70 is equal to
If A diag [d1, d2, d3], then An is equal to
If B is the inverse of A, the is
, the inverse of A is
and I is a unit matrix.
If a, b, c are in A.P. and then f’(x) is :