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JEEMAIN-2017
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Q)
If
A
=
[
2
−
3
−
4
1
]
then adj
(
3
A
2
+
12
A
)
is equal to :
(
1
)
[
51
63
84
72
]
(
2
)
[
51
84
63
72
]
(
3
)
[
72
−
63
−
84
51
]
(
4
)
[
72
−
84
−
63
51
]
$
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