Let the coordinates of the points A, B, C be (1, 8, 4), (0, -11, 4) and (2, -3, 1) respectively. What are the coordinates of the point D which is the foot of the perpendicular from A on BC?

NDA 2018 Mathematics question

Let the coordinates of the points A, B, C be , and respectively. What are the coordinates of the point D which is the foot of the perpendicular from A on BC?

(A)
(B)
(C)Correct
(D)

Answer: (C)

Solution

, so a point of BC is .

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Question ID VK-028869