If K is a scalar and I is the unit matrix of order 3 then adj (KI) =
K3I
K2I
-K3I
-K2I
then AB =
A
B
0
A2 + 2B - 2A
C.C'
B' C
AB
[ -8 3 ]
If A is a matrix of order 3 x 4, then each row of A has ______.
3 elements
4 elements
12 elements
None of these
A2 - B2
A2 + B2
A2 - B2 + BA + AB
A2 - B2 - AB + BA
