# How do you compute the dot product to find the magnitude of #u=6j#?

##### 1 Answer

Jan 8, 2017

#### Answer:

#### Explanation:

It should be absolutely obvious that

We can show this using the dot product using the fact that:

#|| vec u || = sqrt (vecu * vec u) #

To get

#|| vec u || = sqrt ((6)(6)) =sqrt(6^2)=6#