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Question
`A=[[1,2],[3,4]]` ans A(Adj A)=KI, then the value of 'K' is
Options
2
- 2
10
-10
MCQ
Solution
A( Adj A) =|A| . I
`therefore K=|A|`
`therefore |A|=|[1,2],[3,4]|=-2`
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