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Byju's Answer
Standard XII
Mathematics
Finding Inverse Using Elementary Transformations
Find the inve...
Question
Find the inverse of the matrix
⎡
⎢
⎣
1
0
0
3
3
0
5
2
1
⎤
⎥
⎦
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Solution
A
=
⎡
⎢
⎣
1
0
0
3
3
0
5
2
1
⎤
⎥
⎦
,
|
A
|
=
1
(
3
)
=
3
A
d
j
A
=
⎡
⎢
⎣
3
0
0
−
3
1
0
9
−
2
3
⎤
⎥
⎦
∴
A
−
1
=
A
d
j
A
|
A
|
=
1
3
⎡
⎢
⎣
3
0
0
−
3
1
0
9
−
2
3
⎤
⎥
⎦
=
⎡
⎢ ⎢ ⎢ ⎢ ⎢
⎣
1
0
0
−
1
1
3
0
3
−
2
3
1
⎤
⎥ ⎥ ⎥ ⎥ ⎥
⎦
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