CBSE Class 12 Mathematics 2026 Main Paper 65/2/1 · Q252 Marksline_equations
CBSE Class 12 Mathematics 2026 Main Paper 65/2/1 · Question 25 (Three Dimensional Geometry)
Find the point on r=(0,−1,3)+λ(2,−2,1) whose coordinate sum is 3.
✅ Step-by-Step Solution
Final Answer: (2,−3,4).
- The coordinates are (2λ,−1−2λ,3+λ).
- Their sum is 2+λ, so λ=1.
- Substitute λ=1 to get (2,−3,4).
📋 CBSE Stepwise Marking Scheme
- [0.5 marks] The coordinates are (2λ,−1−2λ,3+λ).
- [1 mark] Their sum is 2+λ, so λ=1.
- [0.5 marks] Substitute λ=1 to get (2,−3,4).
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