Subject: Maths
\( \boldsymbol{L} \) and \( \boldsymbol{M} \) are two points with position vectors \( 2 \bar{a}-\bar{b} \) and \( a+2 \bar{b} \) respectively.
The position vector of the point \( N \) which
divides the line segment \( L M \) in the ratio 2: 1 externally is
\( \mathbf{A} \cdot 3 \bar{b} \)
в. \( 4 \bar{b} \)
\( c .5 \bar{b} \)
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