# Calculating the Magnitude of U + V + W

1. Aug 11, 2015

### mattyk

1. The problem statement, all variables and given/known data
U(1, -1, 2)
V(0, 3, -1)
W(-1, -1 1)
Calculate ||(U + V + W)

2. Relevant equations
is it as simple as U + V + W then finding out the magnitude of that point.

3. The attempt at a solution

For example (U + V) + W
then the magnitude of that point?

Last edited: Aug 11, 2015
2. Aug 11, 2015

### mattyk

As far as I can work out it is right but it just seems too simple.

3. Aug 12, 2015

### Staff: Mentor

I think you want |U + V + W|
These are apparently vectors, not points. And yes, just add the three vectors and then find the magnitude.

For a vector V = <a, b, c>, |V| = $\sqrt{a^2 + b^2 + c^2}$.