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MHT CET2009MathematicsMatrices

A= [ array rr & - & array ] and A B=B A=I , then B is equal to

Options

  1. A[ array rr - & & array ]
  2. B[ array rr & - & array ]
  3. C[ array rr - & & array ]
  4. D[ array rr & - - & array ]

Correct answer

B. [ array rr & - & array ]

Step-by-step solution

Given, A= [ array rr & - & array ] and A B=B A=I B=A⁻¹ I=A⁻¹= 1 ² + ² [ array rr & - & array ] B= [ array rr & - & array ]

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