For a 2 × 2 matrix, A = [a_ij], whose elements are given by write the value of a₁₂.

1

State the reason for the relation R in the set {1, 2, 3} given by R = {(1, 2), (2, 1)} not to be transitive.

2

Write the value of

4

For what value of x, the matrixis singular?

5

Write A^–1 for