Sec 3/4 E Math T16-Q16 - Adding and subtracting column vectors

Sec 3/4 E Math T16-Q16 - Adding and subtracting column vectors

Secondary 3
Original parallel to Sec3&4 E Math FA

Given \(\mathbf{a}=\begin{pmatrix}3\\1\end{pmatrix}\) and \(\mathbf{b}=\begin{pmatrix}-1\\5\end{pmatrix}\), find

  1. \(\mathbf{a}+\mathbf{b}\),
  2. \(2\mathbf{a}-3\mathbf{b}\).

Solution:

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Answer:(a) \(\begin{pmatrix}2\\6\end{pmatrix}\); (b) \(\begin{pmatrix}9\\-13\end{pmatrix}\).

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