Additional Mathematics 0606 / Vectors / 3.123.12: Unit vector and equating column vectors0606/12/M/J/22 — Question 4 · 5 marksMark as done · Save for later · Show all solutions(a)Find the unit vector in the same direction as (−158)\begin{pmatrix} -15 \\ 8 \end{pmatrix}(−158).[2]▸ Answer(b)Given that (2a−5)+(4b−123)=4(b−aa+2b)\begin{pmatrix} 2a \\ -5 \end{pmatrix} + \begin{pmatrix} 4b - 12 \\ 3 \end{pmatrix} = 4\begin{pmatrix} b - a \\ a + 2b \end{pmatrix}(2a−5)+(4b−123)=4(b−aa+2b), find the values of aaa and bbb.[3]▸ Answer▸ Official mark scheme← 3.10: Opposite direction vector and linear combination3.14: Ship velocities and distance between ships →
