Multiple Choice Questions on If A is a square matrix then what is adj A 1 adj A 1 equal to ........ for NDA Exam Preparation

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Multiple Choice Questions

If A is a square matrix then what is adj A 1 adj A 1 equal to ........

Mathematics (NDA) Matrices and Determinants
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    If A is a square matrix, then what is  (adj A-1) - (adj A)-1 equal to?

    2 | A |

    Incorrect Answer

     Null matrix

    Correct Answer

     Unit matrix

    Incorrect Answer

    None of these

    Incorrect Answer
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    Explanation:

    (adj A-1) - (adj A)-1 = (adj A)-1 - (adj A)-1=0

    \because (adj A-1) = (adj A)-1
    Hence, it is a null matrix.

    By: Munesh Kumari
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