Find the Length of the Vector $-2 \vec{v}+4 \vec{w}$ If $\vec{v}=\vec{i}+2 \vec{j}-3 \vec{k}$

Short Answer

Find the length of the vector $-2 \vec{v}+4 \vec{w}$ if $\vec{v}=\vec{i}+2 \vec{j}-3 \vec{k}$ and $\vec{w}=-2 \vec{j}$ .