-2
2
-4
4
for x ≠ 0, y ≠ 0, then D is
divisible by neither x nor y
divisible by x but not y
divisible by y but not x
divisible by both x and y
If A and B are two matrices such that AB =B and BA = A , then A2+B2=
2AB
2BA
A+B
AB
If A is a scalar matrix with scalar K = 10 of order 3, then A-1 is______________.
KI
If f(x) = x2 - 5 x , A = , then f(A) is equal to
, then A3 - 4 A2 + 3 A + I =
3 I
I
-I
-2 I
If ,then x is equal to
6
-6
0
The characteristic root of the matrix are
1,3,6
1,2,4
4,5,6
2,4,6
, then trace of matrix A is
17
25
3
12
If A and B are square matrices of the same order such that (A+B) (A-B) = A2 - B2, then (ABA-1)2 is equal to
B2
A2B2
A2