imo class 12 three dimensional geometry

Which of the following points lies on the plane 3x + 2y − z = 6?

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Which of the following points lies on the plane 3x + 2y − z = 6?

  • A. (1, 2, 1)
  • B. (2, 1, 1)
  • C. (1, 1, 2)
  • D. (1, 2, −1)

Answer: A) (1, 2, 1)

Explanation: Substitute points: 3(1) + 2(2) − 1 = 3 + 4 − 1 = 6. (1, 2, 1) satisfies the equation.

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