The points A A\,A and B B\,B have position vectors (−351)\begin{pmatrix} -3 \\ 5 \\ 1 \end{pmatrix}−351 and (147)\begin{pmatrix} 1 \\ 4 \\ 7 \end{pmatrix}147 respectively.
Find the exact length of ABABAB.
Practise Edexcel A Level Maths Vectors with exam-style questions for A Level Maths. 100 questions covering 12.1 3D Coordinates, 12.2 Vectors in 3D, 12.3 Solving Geometric Problems, and 12.4 Application to Mechanics, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.