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JEE Main Math Class 12 Matrices Part 1 Questions
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© examsnet.com
Question : 17
Total: 100
Let
A
=
[
1
1
1
]
and
B
=
[
9
2
−
10
2
11
2
12
2
13
2
−
14
2
−
15
2
16
2
17
2
]
, then the value of
A
′
B
A
is:
[26-Jul-2022-Shift-2]
1224
1042
540
539
Validate
Solution:
A
′
B
A
=
[
1
1
1
]
[
9
2
−
10
2
11
2
12
2
13
2
−
14
2
−
15
2
16
2
17
2
]
A
=
[
9
2
+
12
2
−
15
2
−
10
2
+
13
2
+
16
2
11
2
−
14
2
+
17
2
]
[
1
1
1
]
=
[
9
2
+
12
2
−
15
2
−
10
2
+
13
2
+
16
2
+
11
2
−
14
2
+
17
2
]
=
[
(
9
2
−
10
2
)
+
(
11
2
+
12
2
)
+
(
13
2
−
14
2
)
+
(
16
2
−
15
2
)
+
17
2
]
=
[
−
19
+
265
+
(
−
27
)
+
31
+
289
]
=
[
585
−
46
]
=
[
539
]
© examsnet.com
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