2 public questions tagged with this topic.
Applying the basic concept, complete solution: write formula, plug data, do arithmetic. Final value matches y = 1. Simple and accurate.
Ref: NCERT Mathematics Class XII — Vectors and 3D Geometry
Applying the basic concept, using formula we get al + bm + cn = 0. Calculation gives this directly, check steps: apply rule, substitute values, simplify to get al + bm + cn = 0.
Ref: NCERT Mathematics Class XI — Coordinate Geometry
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