#### Question

Construct a 2 × 2 matrix, `A = [a_(ij)]` whose elements are given by:

`a_(ij) = (1 + 2j)^2/2`

#### Solution

In general, a 2 × 2 matrix is given by A = `[(a_(11), a_(12)),(a_(21), a_(22))]`

`a_(ij) = ((i + 2j)^2)/2, i , j = 1, 2`

`:. a_(11) = ((1+2)^2)/2 = 3^2/2 = 9/2` `a_(12) = (1+4)^2/2 = 5^2/2 = 25/2`

`a_(21) = (2+2)^2/2 = 4^2/2 = 8` `a_(22) = (2+4)^2/2 = 6^2/2 = 18`

Therefore, the required matrix is `A = [(9/2, 25/2),(8, 18)]`

Is there an error in this question or solution?

Solution Construct a 2 × 2 Matrix, `A = [A_(Ij)]` Whose Elements Are Given By: A_(Ij) = (1 + 2j)^2/2 Concept: Order of a Matrix.