# What is  || < 5 , 3, -3 > || ?

The norm of a vector $< a , b , c >$
$| | < a , b , c > | | = \sqrt{{a}^{2} + {b}^{2} + {c}^{2}}$
$| | < 5 , 3 , - 3 > | | = \sqrt{{5}^{2} + {3}^{2} + {\left(- 3\right)}^{2}} = \sqrt{43} = 6.56$