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Questions
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CBSE XII
>>
Math
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Determinants
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Q)
I
f
A
−
1
=
[
3
−
1
1
−
15
6
−
5
5
−
2
2
]
a
n
d
B
=
[
1
2
−
2
−
1
3
0
0
−
2
1
]
,
f
i
n
d
(
A
B
)
−
1
(
A
B
)
−
1
=
[
9
−
2
5
−
2
−
1
0
1
0
2
]
(
A
B
)
−
1
=
[
9
−
3
5
−
2
1
0
1
0
2
]
(
A
B
)
−
1
=
[
−
9
−
3
5
−
2
1
0
−
1
0
2
]
(
A
B
)
−
1
=
[
9
−
3
5
−
2
1
1
1
1
2
]
Share
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