# Thread: Finding the Norm

1. ## Finding the Norm

I was wondering if someone could step me through the following question:

Express v= (2, 1, -3) as a linear combination of i, j and k and find the norm of v.

2. If $\overrightarrow{v}=(a,b,c)$, then $\overrightarrow{v}=a\cdot\overrightarrow{i}+b\cdot \overrightarrow{j}+c\cdot\overrightarrow{k}$

and $|\overrightarrow{v}|=\sqrt{a^2+b^2+c^2}$