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Mathematics - 3D-Coordinate Geometry Question with Solution | TestHub

Mathematics3D-Coordinate GeometryLine ( Equation etc.)Medium2 minQB

MathematicsMediumnumerical

A line through $P = (3, 4, 5)$ has direction ratios $(2, - 2, 1)$ . Point $Q = (1, - 1, 8)$ is reflected in this line to $Q'$ . Find the length of the median of PQ $Q'$ from $P$ .

Answer:

3.00

Solution:

The median ends at the projection of $Q$ on the line. Its length is $∣ PQ \cdot (2, - 2, 1) ∣/3 = 3$ .

Stream:JEESubject:MathematicsTopic:3D-Coordinate GeometrySubtopic:Line ( Equation etc.)

⏱ 2mℹ️ Source: QB

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