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Let A equals open square brackets table row 1 0 0 row 5 2 0 row cell negative 1 end cell 6 1 end table close square brackets, then the ad joint of A is

  1. open square brackets table row 2 cell negative 5 end cell 32 row 0 1 cell negative 6 end cell row 0 0 2 end table close square brackets    
  2. open square brackets table row cell negative 1 end cell 0 0 row cell negative 5 end cell cell negative 2 end cell 0 row 1 cell negative 6 end cell 1 end table close square brackets    
  3. open square brackets table row cell negative 1 end cell 0 0 row cell negative 5 end cell cell negative 2 end cell 0 row 1 cell negative 6 end cell cell negative 1 end cell end table close square brackets    
  4. None of these    

The correct answer is: None of these


    A equals open square brackets table row 1 0 0 row 5 2 0 row cell negative 1 end cell 6 1 end table close square brackets
    rightwards double arrow a d j left parenthesis A right parenthesis equals open square brackets table row 2 cell negative 5 end cell 32 row 0 1 cell negative 6 end cell row 0 0 2 end table close square brackets to the power of T end exponent equals open square brackets table row 2 0 0 row cell negative 5 end cell 1 0 row 32 cell negative 6 end cell 2 end table close square brackets.

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