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UPSC NDA II 2018 Mathematics Solved Paper

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Question : 12

Total: 120

For a square matrix A, which of the following properties hold?
1. (A−1)−1=A
2. det(A−1)=‌‌

3. (λA)−1λA−1 where λ is a scalar
Select the correct answer using the code given below:

1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3

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