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Byju's Answer
Standard XII
Mathematics
Multiplication of Matrices
If [ 1 2; 3...
Question
If
[
1
2
3
4
]
[
3
1
2
5
]
=
[
7
11
K
23
]
find the value of
k
.
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Solution
[
1
2
3
4
]
[
3
1
2
5
]
=
[
7
11
k
23
]
[
3
+
4
1
+
10
9
+
8
3
+
20
]
=
[
7
11
k
23
]
[
7
11
17
23
]
=
[
7
11
k
23
]
∴
k
=
17
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