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Black Book Advanced Problems in MathematicsMathematicsDeterminants

If the system of equations 2x + ay + 6z = 8,x + 2y + z = 5,2x + ay + 3z = 4 has a unique solution then 'a' cannot be equal to:

Options

  1. A2
  2. B3
  3. C4
  4. D5

Correct answer

C. 4

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