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Question

If A = open square brackets table row 3 2 row 1 4 end table close square brackets and B =open square brackets table row cell negative 1 end cell 2 row cell negative 1 end cell 1 end table close square brackets, then correct statement is -

  1. AB = BA    
  2. AAT = A2    
  3. AB = B2    
  4. None of these    

The correct answer is: None of these


    To find the correct statement from the given options.
    Since, the two matrices given are not commutative ,i.e, adding two matrices in any order we are not getting the same result, so AB is not equal to BA.
    We know that, A A to the power of T = I. Therefore, option 2 is wrong.
    Since, A and B are not identical, AB is not equal to A squared

    Therefore, none of  the given options is true.

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