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Question

If A is a square matrix of order 3×3, then |KA| is equal to

A
K|A|
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B
K2|A|
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C
K3|A|
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D
3K|A|
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Solution

The correct option is C K3|A|
We know that, for any n×n matrix P, |kP|=kn|P|
|KA|=K3|A|

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