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Byju's Answer
Standard XII
Mathematics
Addition and Subtraction of a Matrix
If A + 2B =...
Question
If
A
+
2
B
=
⎡
⎢
⎣
1
2
0
6
−
3
3
−
5
3
1
⎤
⎥
⎦
and
2
A
−
B
=
⎡
⎢
⎣
2
−
1
5
2
−
1
6
0
1
2
⎤
⎥
⎦
, then
t
r
(
A
)
−
t
r
(
B
)
=
A
1
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B
2
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C
3
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D
4
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Solution
The correct option is
B
2
t
r
(
A
)
−
t
r
(
B
)
=
t
r
(
A
−
B
)
A
−
B
=
6
A
−
A
5
−
(
3
B
+
2
B
)
5
A
−
B
=
3
5
(
2
A
−
B
)
−
1
5
(
A
+
2
B
)
t
r
(
A
−
B
)
=
3
5
t
r
(
2
A
−
B
)
−
1
5
t
r
(
A
+
2
B
)
t
r
(
A
−
B
)
=
3
5
(
2
−
1
+
2
)
−
1
5
(
1
−
3
+
1
)
=
9
5
−
−
1
5
=
10
5
=
2
Suggest Corrections
0
Similar questions
Q.
Let
A
+
2
B
=
⎡
⎢
⎣
1
2
0
6
−
3
3
−
5
3
1
⎤
⎥
⎦
and
2
A
−
B
=
⎡
⎢
⎣
2
−
1
5
2
−
1
6
0
1
2
⎤
⎥
⎦
, then find tr(A) - tr(B).
Q.
Let
A
+
2
B
=
⎡
⎢
⎣
1
2
0
6
−
3
3
−
5
3
1
⎤
⎥
⎦
and
2
A
−
B
=
⎡
⎢
⎣
2
−
1
5
2
−
1
6
0
1
2
⎤
⎥
⎦
, then
t
r
(
A
)
−
t
r
(
B
)
has the value equal to
Q.
Let
A
+
2
B
=
⎡
⎢
⎣
1
2
0
6
−
3
3
−
5
3
1
⎤
⎥
⎦
and
2
A
−
B
=
⎡
⎢
⎣
2
−
1
5
2
−
1
6
0
1
2
⎤
⎥
⎦
.
Then
tr
(
A
)
−
tr
(
B
)
has the value equal to
Q.
Let
A
+
2
B
=
⎛
⎜
⎝
1
2
0
6
−
3
3
−
5
3
1
⎤
⎥
⎦
and
2
A
−
B
=
⎛
⎜
⎝
2
−
1
5
2
−
1
6
0
1
2
⎤
⎥
⎦
,
then
find
tr
(
A
)
−
tr
(
B
)
.