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TS EAMCET 18-July-2022 Shift 2 Solved Paper
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© examsnet.com
Question : 4
Total: 160
A,
P
,
B
are
3
×
3
matrices. If
|
−
B
|
=
5
,
|
B
A
T
|
=
15
,
|
P
T
A
P
|
=
−
27
, then one of the values of
|
P
|
is
3
-5
9
6
Validate
Solution:
👈: Video Solution
|
−
B
|
=
5
⇒
(
−
1
)
3
|
B
|
=
5
⇒
|
B
|
=
−
5
|
B
A
T
|
=
15
⇒
|
B
|
A
T
|
=
15
⇒
(
−
5
)
|
A
|
=
15
⇒
|
A
|
=
−
3
[
∵
|
A
T
|
=
|
A
|
]
Again,
|
P
T
A
P
|
=
−
27
⇒
|
P
T
|
|
A
|
|
P
|
=
−
27
⇒
|
P
|
|
A
|
|
P
|
=
−
27
[
∵
|
P
T
|
=
|
P
|
]
⇒
|
P
|
2
(
−
3
)
=
−
27
⇒
|
P
|
2
=
9
∴
|
P
|
=
±
3
.
© examsnet.com
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