Mathematics

Problem

Let

\vec{a}=2\mathbf{i}-\mathbf{j}+3\mathbf{k}

and

\vec{b}=-\mathbf{i}+4\mathbf{j}-\mathbf{k}

. What is

|\vec{a}+\vec{b}|

? a)

\sqrt{26}

\sqrt{50}

\sqrt{14}

\sqrt{6}