Business Studies, asked by kandanr02, 2 days ago

find the inverse of matrix A= [1 1 1] [ 2 -1 3] [3 2-1 ]​

Answers

Answered by madhuz2021
0

Answer:

Solution

A=  

 

1

0

3

 

2

1

1

 

1

1

1

 

 

A=AI

 

1

0

3

 

2

1

1

 

1

1

1

 

=A  

 

1

0

0

 

0

1

0

 

0

0

1

 

 

R  

3

→R  

3

−3R  

1

 

 

1

0

0

 

2

1

−5

 

1

1

−2

 

=A  

 

1

0

−3

 

0

1

0

 

0

0

1

 

 

R  

3

→R  

3

−5R  

2

 

R  

1

→R  

1

−2R  

2

 

 

1

0

0

 

0

1

0

 

−2

1

−7

 

=A  

 

1

0

−8

 

−2

1

0

 

0

0

1

 

 

R  

3

→  

7

−1

R  

3

 

 

1

0

0

 

0

1

0

 

−2

1

1

 

=A  

 

1

0

7

8

 

 

−2

1

0

 

0

0

7

−1

 

 

 

R  

2

→R  

2

−R  

3

 

R  

1

→R  

1

+2R  

3

 

 

1

0

0

 

0

1

0

 

0

0

1

 

=A  

 

1+  

7

16

 

7

8

 

7

8

 

 

−2

1

0

 

7

−2

 

7

−1

 

7

−1

 

 

 

A  

−1

=  

 

7

25

 

7

8

 

7

8

 

 

−2

1

0

 

7

−2

 

7

−1

 

7

−1

 

 

 

 

Explanation: pls mark brainliest

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