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Question
If A is a matrix of order 3 × 3, then |3A| = ______.
Solution
If A is a matrix of order 3 × 3, then |3A| = 27|A|.
Explanation:
We know that for a matrix of order 3 × 3
|KA| = K3|A|
∴ |3A| = 33|A|
= 27|A|
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