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KVPY SX SB Exam 19-Nov-2017 Question Paper
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© examsnet.com
Question : 13
Total: 120
Let
A
–
1
=
[
1
2017
2
1
2017
4
1
2018
8
]
. Then
|
2
A
|
−
|
2
A
–
1
|
is =equal to
3
–3
12
–12
Validate
Solution:
2
3
|
A
|
−
2
3
1
|
A
|
|
A
–
1
|
=
[
1
2017
2
1
2017
4
1
2018
8
]
1
|
A
|
=
−
2
⇒
|
A
|
=
−
1
2
Put the value answer is = 12
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