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MHT CET202124 Sep 2021Evening ShiftMathematicsMatricesActual

If A= [ array cc & i i & - array ] and A⁻¹ does not exist, then =( where I= -1 )

Options

  1. A2
  2. B1
  3. C0
  4. D3

Correct answer

B. 1

Step-by-step solution

A= [ array cc & i i & - array ] | A |= | array cc & i i & - array | Since A ⁻¹ does not exist, we write | A |=0 (- ^2 )- ( i ^2 )=0 ^2=1 = 1

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