"Find the position vector of a point `R` which  divides the line joining two points `P` and `Q`
Channel: Doubtnut
Date: 2019-12-27

"Find the position vector of a point `R`
 which
  divides the line joining two points `P`
 and `Q`
 whose
  position vectors are `(2\\ vec a+ vec b)`
 and (` vec a-\\ 3 vec b)`
 respectively, externally in the ratio
  1:2.Also, show that `P`
 is the
  mid-point of the line segment `R Qdot`"

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