The position vectors of A and B are \(\rm \vec{a}\) and \(\rm \vec{b}\)Then the position vector of point p dividing AB in the ration m : n is
1
\(\rm \frac{\rm n\vec{a} +m \vec{b}}{m+n}\)
2
\(\rm \frac{\rm n\vec{a} +m \vec{b}}{m-n}\)
3
\(\rm \frac{\rm n\vec{a} -m \vec{b}}{m+n}\)
4
None of these