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If A and B are squar matrices of order 3...

If A and B are squar matrices of order 3 such that |A|=-1, |B|=3 then |3AB| is equal to

Text Solution

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`|3AB|=>3^n|AB|`
`3^3|A||B|=>27(-1)*3`
`|3AB|=-81`
order=3.
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