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UPSC NDA 2 2017 Mathematics Solved Paper

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Question : 14 of 120

Marks: +1, -0

If A is a square matrix, then the value of adj AT−(adj‌A)T is equal to

A
2|A|I , where I is the identity matrix
Null matrix whose order is same as that of A
Unit matrix whose order is same as that of A

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