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.
42 exam-style questions on Edexcel A Level Maths 12.2 Vectors in 3D. Each one has a worked solution and a mark scheme showing where the marks go.