A-LevelFurther MathematicsVectors and 3D GeometryMay/June 2021Paper 1 Q612 Marks
Let t be a positive constant. The line l₁ passes through the point with position vector ti+j and is parallel to the vector -2i-j. The line l₂ passes through the point with position vector j+tk and is parallel to the vector -2j+k. It is given that the shortest distance between the lines l₁ and l₂ is √21.
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