# What is the norm or < 4 , 3 , 9 >?

Apr 14, 2016

$| | A | | = \sqrt{106}$

#### Explanation:

$A = < 4 , 3 , 9 >$

$| | A | | = \sqrt{{4}^{2} + {3}^{2} + {9}^{2}}$

$| | A | | = \sqrt{16 + 9 + 81}$

$| | A | | = \sqrt{106}$