Let and
If B is the inverse of matrix
, then
is
2
-1
-2
5
As we learnt in
Inverse of a matrix -
-
and B is the inverse of A.
So
Now
Option 1)
2
Incorrect answer
Option 2)
-1
Incorrect answer
Option 3)
-2
Incorrect answer
Option 4)
5
Correct answer
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