Question

Find the specified vector or scalar.

Answer 1

$\bf \begin{cases} u=-4i+1j\implies & \ \textless \ -4,1\ \textgreater \ \\ v=4i+1j\implies &\ \textless \ 4,1\ \textgreater \ \end{cases}\qquad u+v\implies \ \textless \ -4,1\ \textgreater \ +\ \textless \ 4,1\ \textgreater \ \\\\\\ \ \textless \ -4+4~,~1+1\ \textgreater \ \implies \ \textless \ 0,2\ \textgreater \ \\\\ -------------------------------\\\\ \stackrel{magnitude}{||u+v||}\implies \sqrt{0^2+2^2}\implies 2$