Question

How do I add two vectors?

Answer 1

you can add them using the head to tail method or algebraically? your question is a bit borad, is there a specific case you want me to clarify?

Answer 2

<a,b>+<c,d>
=
<a+c,b+d>

Answer 3

or 3d
<a,b,c>+<c,d,e>
=
<a+c,b+d,c+e>