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Byju's Answer
Standard XII
Mathematics
Point of Inflection
If A=diag2,4,...
Question
If
A
=
diag
(
2
,
4
,
5
)
,
then the trace of
A
−
1
is
A
19
20
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B
13
20
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C
11
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D
12
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Solution
The correct option is
A
19
20
Given
A
is a diagonal matrix
∴
A
−
1
=
diag
(
2
−
1
,
4
−
1
,
5
−
1
)
⇒
Trace of
A
−
1
=
1
2
+
1
4
+
1
5
=
19
20
Suggest Corrections
0
Similar questions
Q.
If
A
=
⎡
⎢
⎣
1
−
5
7
0
7
9
11
8
9
⎤
⎥
⎦
, then trace of matrix
A
is
Q.
If
A
=
⎡
⎢
⎣
1
−
5
7
0
7
9
11
8
9
⎤
⎥
⎦
, then trace of matrix A is.
Q.
If
A
=
[
2
0
5
−
3
]
and
B
=
[
−
2
1
3
−
1
]
, then find the trace of
(
A
B
T
)
T
.
Q.
If the traces of
A
,
B
are
20
and
−
8
, then the trace of
A
+
B
is:
Q.
If
A
=
∣
∣
∣
2
0
5
−
3
∣
∣
∣
B
=
∣
∣
∣
−
2
1
3
−
1
∣
∣
∣
, then the find the trace of
(
A
B
T
)
T
.
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