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MHT CET20225 Aug 2022Evening ShiftMathematicsMatricesActual

If A= [ array lll 1 & 2 & 3 1 & 3 & 4 3 & 4 & 3 array ] , then A⁻¹=

Options

  1. A- 1 4 [ array ccc -7 & -6 & -1 9 & 6 & -1 -5 & -2 & 1 array ]
  2. B1 4 [ array ccc -7 & 6 & -1 9 & -6 & -1 -5 & 2 & 1 array ]
  3. C- 1 4 [ array ccc -7 & 6 & 1 9 & -1 & 1 -5 & 2 & 1 array ]
  4. D- 1 4 [ array ccc -7 & 6 & -1 9 & -6 & -1 -5 & 2 & 1 array ]

Correct answer

D. - 1 4 [ array ccc -7 & 6 & -1 9 & -6 & -1 -5 & 2 & 1 array ]

Step-by-step solution

A⁻¹= adj (A) |A| =- 1 4 [ array ccc -7 & 6 & -1 9 & -6 & -1 -5 & 2 & 1 array ]

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