a=(−34)\mathbf{a} = \begin{pmatrix} -3 \\ 4 \end{pmatrix}a=(−34) b=(72)\mathbf{b} = \begin{pmatrix} 7 \\ 2 \end{pmatrix}b=(72)
Work out 2a+b2\mathbf{a} + \mathbf{b}2a+b as a column vector.
