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MHT CET2010MathematicsMatrices

If matrix A= [ array ll a & b c & d array ] , then |A|⁻¹ is equal to

Options

  1. Aa d-b c
  2. B1 a d-b c
  3. C1 a d-b c [ array rr d & -b -c & a array ]
  4. DNone of these

Correct answer

B. 1 a d-b c

Step-by-step solution

Given, A= [ array ll a & b c & d array ] array l |A|=a d-b c |A|⁻¹= 1 a d-b c array

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