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MHT CET2016MathematicsPair of Lines

Which of the following equation does not represent a pair of lines?

Options

  1. Ax 2 - x = 0
  2. Bx y - x = 0
  3. Cy 2 - x + 1 = 0
  4. Dx y + x + y + 1 = 0

Correct answer

C. y 2 - x + 1 = 0

Step-by-step solution

Δ = | a h g h b f g f c | ≠ 0

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