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NDA Math Matrices

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Question : 9

Total: 69

Let A be a non-singular matrix and B= adj A. Which of the following statements is\/are correct ?
1. AB=BA
2. AB is a scalar matrix
3. AB can be. a null matrix
Select the correct answer using the code given below :

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

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