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MHT CET2011MathematicsMatrices

The multiplicative inverse of A= [ array cc & - & array ] is

Options

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

Correct answer

B. [ array cc & - & array ]

Step-by-step solution

|A|= ² + ² =1 array l adj (A)= [ array ll & - & array ] A⁻¹= adj (A) |A| = [ array ll & - & array ] array

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