The points C C\,C and D D\,D have position vectors (4−12)\begin{pmatrix} 4 \\ -1 \\ 2 \end{pmatrix}4−12 and (035)\begin{pmatrix} 0 \\ 3 \\ 5 \end{pmatrix}035 respectively.
Find the exact length of CDCDCD.
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.