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Parametric equations x = 1 + 2λ, y = 3 - λ, z = 4λ give direction ratios:
A1, -1, 2
B2, -1, 4
C2, 1, 4
D1, 3, 4
Answer & Solution
Correct answer: B. 2, -1, 4
The coefficients of λ in the three equations are the direction ratios.
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