- #1

organgeatom

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## Homework Statement

I cannot find other sources to help me with this problem set, I have A B and C vectors defined by: A (2,1,1) B(1,-1,0), C(-1,1,-1)

From these I have a list of questions and some I am stuck on are:each of these are vectors with an arrow above it

1. |A| + |B| this I did as √ax^2 +ay^2 +az^2 + √the same for B

2. |A + B| but how do i do this, what is the difference between these?

3. A + B

4. 3C

5. A dot (B X C)

8. What is the angle between A and B, A and C, and B and C? in radians use pi

id appreciate any help!