Answer:
option C
1 1/2
0 1/2
Explanation:
general form of a matrix is,
a b
c d
the given matrix is,
1 -1
0 2
the inverse of a matrix is,
1 / ad - bc * matrix d -b
-c a
by substituting the values of a = 1, b = -1, c = 0 and d = 2
1 / 2 + 0 * matrix 2 1
0 1
1/2 * matrix 2 1
0 1
1 1/2
0 1/2
is the inverse matrix