Question

The inverse of matrix 1 -1
2 3

Answer 1

Answer:

Given, A=[

2

1

1

3

]

∣A∣=5

Now, adjA=C

T

=[

3

−1

−1

2

]

T

⇒adjA=[

3

−1

−1

2

]

A

−1

=

5

1

[

3

−1

−1

2

]

Answer 2

having above pic as model...

the answer is

1/5 {(3,1),(-2,1)}