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NDA2010MathematicsMatricesActual

If A= [ array cc 0 & 1 -1 & 0 array ], B= [ array cc i & 0 0 & -i array ], C= [ array cc 0 & -i -i & 0 array ] then which one of the following is not correct?

Options

  1. AA^2=B^2
  2. BB^2=C^2
  3. CA B=C
  4. DA B=B A

Correct answer

D. A B=B A

Step-by-step solution

The correct answer is option (D).

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