imo class 12 three dimensional geometry

Which line is perpendicular to plane x+y+z=0?

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#IMO#Class 12#Mathematics#Three-Dimensional Geometry#logical-reasoning

Which line is perpendicular to plane x+y+z=0?

  • A. DRs (1,1,1)
  • B. DRs (1,−1,0)
  • C. DRs (0,1,−1)
  • D. DRs (1,0,−1)

Answer: A) DRs (1,1,1)

Explanation: Line perpendicular to plane is along its normal.

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