If a matrix has 18 elements, what are the possible orders it can have What, if it
has 5 elements 4 Construct a 2 × 2 matrix, A = [aij], whose elements are given by:
(i)
2
(
)
2
ij
i
j
a
+
=
(ii)
ij
i
a
j
=
(iii)
2
(
2 )
2
ij
i
j
a
+
=
5