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Direction ratios of the line through (1, 2, 3) and (3, 5, 9) can be taken as
A1, 2, 3
B3, 5, 9
C2, 3, 6
D4, 7, 12
Answer & Solution
Correct answer: C. 2, 3, 6
Subtracting the coordinates gives 3-1, 5-2, 9-3, which is 2, 3, 6.
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