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UPSC NDA I 2012 Mathematics Paper
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© examsnet.com
Question : 5
Total: 120
If
A
=
(
1
2
2
3
)
and
B
=
(
1
0
1
0
)
then what is determinant of
AB
?
0
1
10
20
Validate
Solution:
[
1
2
2
3
]
[
1
0
1
0
]
AB
=
[
3
0
5
0
]
(
AB
)
=
0
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