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Standard XII
Mathematics
Scalar Multiplication of a Matrix
If A is a ...
Question
If
A
is a
3
×
3
skew symmetric matrix, then trace of
A
is equal to
A
−
1
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B
7
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C
|
A
|
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D
None of these
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Solution
The correct option is
D
None of these
For skew symmetric matrix all diagonal elements must be zero.
Trace is the sum of diagonal elements is zero.
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