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Line through (1, -1, 2) and (3, 4, -2), and line through (0, 3, 2) and (3, 5, 6), are:
Aparallel lines
Bperpendicular lines
Ccoincident lines
Dlines at 45 degrees
Answer & Solution
Correct answer: B. perpendicular lines
Their ratios are 2, 5, -4 and 3, 2, 4, with dot product 6 + 10 - 16 = 0.
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