Lines r = a + b and r = b + a intersect at point (2,4,-4). If | a - b |=4, then a b =

MHT CET 2026 Mathematics question

Lines and intersect at point . If , then

Answer: (A)

At the point of intersection , so . Since and are not parallel (the lines are distinct), and . The point of intersection is therefore $ a+ b=2

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Question ID VK-101531